Advertisement. Wax a blade to cut the foam. post #1 of 5 AHowdy! There’s a certain technique you can do to get a constant smooth spread. No matter which type you work with, a sharp utility knife or craft knife is a must. Our FR-7100 tooling board is a very uniform board that is easily finished or painted for low-cost core applications as well as use for composite layup tools and for industrial patterns. With its accuracy and precision, it prevents the exposure of internal foam in the final prototype assembly ensuring neat and flawless projects. Otherwise, they could chip away and leave visible white spots. Foam board -- more commonly called foamcore -- is used for a variety of art projects, from model building to mounting artwork. Often it isn’t even necessary to cut all the way through, you can simply score it and then snap along the scored line. For basic straight cuts, choose a blade with a handle that's comfortable to hold. Once I trimmed the foam board with a sharp knife, the edges were smooth and straight. You can do the same thing without a compass by tying a knot in the end of a piece of string and tacking that end to the center of the board. Decorating By vgcea Updated 6 May 2013 , 6:03am by vgcea vgcea Posted 5 May 2013 , 6:28am. Then, clamp the rigid board to a flat surface with rubber clamps so it's held still and you can cut it … They are especially effective for creating rounded edges or shapes out of styrofoam. The Rabbet Foam Board Cutter is a handy cutting tool that every model maker and display builder should have. It is designed to transform XPS foam's crunchy cell structure into a smooth, paintable surface. Use the pencil end to draw your circle. Trim the edges of the board. 1. To protect the work surface, use a cutting board or cutting mat when cutting Styrofoam. Press and move your palms outward toward the edges of the poster to affix the poster smoothly to the mounting board. Then I ball up the steel wool and rub along the length of the neck on the fret edges until the fret edges are smooth. Cut First: Don’t paint then cut, do it the other way around. Use caution at edges and tight corners to avoid chipping at the start of a new pathway and when exiting the foam. A hot knife- that’s the secret! Like a snow plow, push that product slowly with your foam roller at about a 45 degree angle. Cutting Foamboard Smoothly, and Easily. Foam core and facer panel are trimmed to an clean, smooth and even edge on all sides. Once again, add plenty of tacky glue and press them in place, smoothing the down to help remove any … ), I will send you a picture. It is designed for making perfect 90-degree corners on foam boards. So I recently saw a tip on covering wire shelves with foam board. Polystyrene scrap board. Therefore, the fix is about filling the hole and avoid water coming inside the board. For extruded polystyrene such as the blue foam board insulation, you can cut it well with any sharp blade. I did a search and found multiple threads with different options. Jagged edges galore.Then I got a dry wall cutter. After priming and painting it with what was supposed to be foam safe spray paint, I’m left with a cratered mess. It is recommended that you do a rough cut first, leaving 1-3 mm of material for finishing. Model building using polystyrene foam affords the user with an inexpensive lightweight alternative to the use of wood as a modeling material, all while still allowing the use of woodworking tools to shape the foam. If it works as fantastically as I think it will (famous last words! After many weeks of sanding and shaping the blue foam board, I had a beautiful classic car prop for a school play. Use a straight edge or ruler and use a permanent marker to make a clear and precise line. The larger the bit, the more of the edge it will be able to smooth at once. Even with its flaws—namely, its inability to perfectly mold to the bays between the studs—rigid foam insulation will be a better bet than no insulation. January 11, 2014 at 7:52 pm. Best Tool For Cutting Foam Core Board. If you're remodeling, though, and you're working with existing framing, you may have to add a 2x4 at the seam. Prop: Shop – Smoothing Foam Edges PunishedProps February 22, 2016 Blogs , Foam , Techniques , Videos Learn the tricks to making the edges of your cut EVA foam pieces all nice and smooth. Valerie Earnest says. Place the point of the compass directly onto the foam board and draw the circle with the pencil end. Creating rounded edges. If you’re going to cut a lot of foam, or desire to work with expanded polystyrene, you’ll want to get a hot wire cutter. Just as it is used for art, there is an art to cutting foamcore correctly. The cut is approximately of 15 cm length and 1 cm depth (It does not seem too deep) and doesn’t look to reach other than the top foam layer. Foam board, whether a thin style used for crafts or the thick insulating type sold in large sheets, requires a bit of finesse when it comes to creating the perfect cut. I craft large 'reverse' sculptures with foam board. Apply slow, consistent pressure with the hot wire cutter along the desired cutting line. My edges, especially the corners, are a little crumbly. THANK YOU for the amazing idea! That allows you to anchor the edges of the cement board and the drywall. Then go over that with thinset. You know, the thicker foam board you find with poster boards in the store. : Foam board is one of my favorite art supplies. I use foam board (aka foam core) in almost all my big projects — masks, Halloween decorations, etc — and I’ve learned a lot of techniques that help make working with it a lot easier.. First, check out my article about buying cheap foam board in bulk. Cutting incorrectly results in shredded and bumpy-edged foam board that looks unprofessional. Guided by the seat's edges, trim the excess foam with an electric carving knife or serrated bread knife. You can smooth the thinset with a wet paint brush while it is still wet. For example, if you’re smoothing the edges of a wine bottle that you’ve cut in half, make sure the sanding bit can fit inside the hole so it can sand the inner corners of the glass edge. If you cut Styrofoam incorrectly, the plastic foam may crumble or break in the wrong spots. To cover up those white edges, next we'll add the thin black printouts with the purple girders. So far I've tried a new exacto knife but that got old fast especially with the thicker boards and having to cut on both sides. Sand Foam Edges: Sand down the foam edges before painting. You can wear down the protective tape doing this, so re-taping may be needed. I tape off along the back edge of the neck and the top of the frets, leaving only the edges of the fret board exposed. Move your hands slowly and carefully to ensure you do not create wrinkles or air bubbles. Sand all edges and faces smooth. Now follow these six easy steps for a custom seat. Then you can paint it. Any tips on what I can cover the foam with to fill in the craters and create a smooth, paintable surface to salvage my work? Hot wire cutters melt through the foam with a heated wire, creating a smooth edge. You could use a utility knife, old kitchen knife, bread knife, or box cutter. Amazon.com: foam board corner protectors Roving Cove Table Edge and Corner Guards, Baby Proof Table Furniture Fireplace, 3M Pre-Taped Corners, 16.2 ft 15 ft Edge 4 Corners , Onyx Black, Heavy-Duty 4.5 out of 5 stars 8,954 $18.75 $ 18 . We like to refer to this technique as snow plowing. After it dries, you can sand it. These foams are very easy to cut with a knife (or hot wire cutter, except PU foam) and both styrofoam and PU foam can be sanded effortlessly to a smooth, sharp finish even for very small forms. Smooth the edges of your photo with a nail file when you're finished trimming. This is not the case with polystyrene because of its much larger cell structure. I picked up 5 sheets of foam board for $1 each – you can find these at Wal-Mart, craft stores, even the dollar store. It's a good idea to set this new wall stud in the wall facing out rather than on edge. To cut foam board straight, start by making sure you measure and mark a straight line. After cutting out a 5 foot Christmas Angel, I was playing around with m… But rigid foam insulation does not soak up water, and its smooth surface does not harbor mold in the way that fiberglass' millions of air pockets do. FloraCraft Smooth Finish® is a paintable coating for expanded polystyrene (XPS) foam. FloraCraft Smooth Finish is easy to apply with a spatula, putty knife or paintbrush and requires minimal to no sanding. Cut the foam to shape. The paper layer, when painted, will look much different than the foam edge, but both will hold paint. Reply. ronna on May 09, 2016: Should I do anything to the edges of the Wedi Board before beginning my mosaic? Tie the other end of the strong around a pencil. Place both palms into the center of the poster. Moving too fast through the foam will cause the wire to snap. After shaping, as with wood, the final surface of the foam tends to be flawed. Smooth the entire poster from the center point out to the edges on all sides. Make sure the sanding bit is the right size for your glass piece. These edge overlaps will be easy to sand smooth once dry. The wax will make the blade slide smoothly in the foam. Try these cutting methods the next time you work with a piece of Styrofoam. These tend to break up or can’t be sanded down below a certain size. Yes, you should cover and reinforce the edges with tape first. It can be frustrating and almost impossible to get curves to cut perfectly. How to Cut Styrofoam. Each fits one one edge so try lining them up until you fit the right edge. Foam board comes in both black and white. I think I may even be able to make it to cover up the plastic edges on the white board? Keep the string taut and your finger on the thumbtack. The top of my soft board was cut the other day by a fin. Place your mounted photo on top of a cutting board, and use a box cutter or X-Acto knife to trim the edges of your mount board. Take a white candle and rub it against the blade before you slice through the foam. And the little scrap left behind – don’t throw that out. To create a variety of Styrofoam shapes, consider using cookie cutters. I’m covering the first (top) side of the left horizontal stabilizer half just as I did the rudder. 2. Adhere the oversize piece of foam to the seat with spray adhesive. I measured my shelves and then cut foam board to shape. Make long smooth cuts so you don't get choppy edges in the foam. Press metal cookie cutters in foam sheets no more than 1/2-inch (1.27-cm) thick. Working with foam board for art projects; cutting, painting, etc Published by Manning on September 7th, 2015. Be sure to keep the blade cutting vertically. Start at the middle of your piece and like a snow plow, push that product slowly at a steady even pace, one line at time towards the edge. Carton Quantities: Panel Thickness: Pieces Per Carton : 1/4″ 12: 1/2″ 12: 3/4″ 8: 1″ 12: 1-1/2″ 8: 2″ 6: 3″ 4 . To hang your foam board print on the wall, inset a sawtooth foam hanger (like this) to the back of the board and hang on a nail. I have tried lots of different ways to cut foam core before. Trimmed Foam Core Boards Foam core boards are pre-trimmed to available sizes. Method 2 of 2: Wet Mounting Photographs. Cut the material into the desired shape before painting. 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