The finished ‘niche’ form can be seen in the last photo below. That sounds a really useful tip re. .. but because the glue itself doesn’t completely ‘dry out’ there’s still some visible join line and of course it’s no good for gap filling. I purchased a small container of Lepages Extra Fine polyfilla and gave it a go. If, because of the shape of the pieces, it is difficult to clamp without damaging the surface, masking tape or cling-film could be used to bind them together but these could give way a little and there may well some shifting as the foam expands. I used the most basic epoxy resin glue .. the ToolBox brand from Poundland. Fabric. Polycell Fine Surface Polyfilla is in my experience the best of these. I assume that the standard sheet size of 600x1200mm has been worked out as the most convenient for interior cladding. To get an even, lump-free cream with water it’s best to ‘condition’ some of it first either in a bowl with a spoon or on a clean glass plate with a spatula or palette knife. It will probably fix the paint better but it won’t add any more strength. ( Log Out /  The template shape is left on to act as a ‘stop’ in the sanding. Styrofoam balls (3-inch, 4-inch and 4.5-inch) cornstarch white craft glue Snow-Tex 7 black seed beads 3 small black beads 1 brown chenille stem black craft foam wooden skewer orange acrylic paint fabric scrap small paint brush ink pen or pencil scissors hot glue gun and glue sticks wire cutters slicing with sharp knives or a hot-wire cutter, sawing with serrated blades, rasping with files, and smoothing with sandpaper. Here are the methods I’ve employed for a particular model piece which needed a ‘bowl-like’ form and very regular curves. Thanks for saying! Foam balls are ideal tools for making solar system projects, snowmen, ornaments and centerpieces. Think of this more like ‘riveting’ .. applying very quick spots of hot glue which will secure the pieces at those points once the glue has cooled. Thank you so much for posting this, and for sharing your knowledge in general. It’s a matter of luck whether you live in a region where the Dow product is preferred or those from the other big manufacturer of insulation foam Owens Corning .. but there are also a host of others! After many weeks of sanding and shaping the blue foam board, I had a beautiful classic car prop for a school play. (a bit more expensive than in UK, around 20€ for approx indicated size) happy me :)) thans for your help. Soda bottle, Styrofoam ball, wire. They come in different grits and are easy to cut into sizes you might need. Polyester resin cannot be used to coat styrofoam because the styrene part of it will eat into the surface. Foamboard VOC Adhesive in a caulking gun configuration. Very informative. I have used a 40 grit sandpaper for this. Thank you. Finally found Some ! For the same reason, I’ve found that it can help to dust the piece with talc while sanding. The other small additions are shaped using much the same methods, starting with a base template to create blocks. Quilted Christmas Ornaments Christmas Crafts Christmas Balls Styrofoam Ball Crafts Fabric Balls Diy Y Manualidades Navidad Diy 242 Idee Diy. I’ll need to cover this briefly first. As long as the plastic (or cardboard) is a little more resilient than the foam the difference will be felt once the edge is reached. If this is allowed to dry completely (needing a good few hours or preferably a whole day) and then painted again, the pores will start to be filled. Posted on January 17, 2016 by david neat. Made in USA. You can cut a round styrofoam ball in half by tracing a line along its equator with a sharp pencil. After about an hour this cured enough to be sanded, just to even out the surface a little, before being coated again. Firstly, the end needs to be cut and filed/sanded straight i.e. slicing with sharp knives or a hot-wire cutter, sawing with serrated blades, rasping with files, and smoothing with sandpaper. Spraymount never sets completely hard, even though it’s grip is strong. If you discover anything not mentioned, please let me know. These solid polystyrene - styrofoam balls can be painted with acrylic paints or decorated with endless craft and modelling materials. I made some notches with the scalpel, spray-moistened the styrofoam surface, then laid the glue into them making sure to spread it completely over the edges of the cuts. I also slanted the edges of the block a little i.e. The most reliable way of gluing separate styrofoam parts together is to use a special ‘foam friendly’ glue such as UHU Por. Wikipedia has it basically right, with an interesting and informative article here: I found that blue styrofoam will respond to sanding with even quite a thin strip of sandpaper if this is supported. This site uses Akismet to reduce spam. I looked at the Tomps resin for coating but think I will stick to the Polycell suggestion. .and at the end, sand down the edges to make it as smooth and round as possible: Because of its smooth … Thanks! Works very well but some sanding will still be required and sometimes filling in small indents (concrete translates the tiniest of indents). I have composite forms made many years ago which have been well-used as teaching examples and show no signs of coming apart! A smooth styrofoam ball (I used a 3″) Narrow ribbon. Step 1 Spread a thin layer of foam coating on the surface of the Styrofoam with a paintbrush. Remember the snowmen bed spring nodders? I wonder, could this be used to fill in small imperfections in the foam and then sanded out or would you suggest some other way? I make things with polymer modified concrete and often use Styrofoam for the cavities. This spherical, lightweight foam shape is made from post-consumer plastic. The real challenge lies in controlling the shape and especially, in this case, how one achieves concave forms. Tag Archives: cutting smooth holes in styrofoam Cutting smooth holes in foam. Can Styrofoam be sculpted into non regular shapes, like a bike seat, – similar to the way you might use clay to come up with a model? Perfect for craft projects, floral projects and more! Once your ball is fully round, you can finish it off by sanding it lightly with the sandpaper. For example fabric will become rigid and almost ‘resin-hard’ if soaked with it and the manufacturer recommends it for outdoor sculpture. Floracraft-Smooth Styrofoam Ball. It is a smooth, closed cell foam, most commonly referred to as smooth Styrofoam ®. It is cheap and gives a strong bond. For each of the ‘teeth’ shown below I held the drill bit or file at a slant outwards from the centre of the ring and also slanting forwards around the ring, as saw teeth normally are. ( Log Out /  Thank you , Awesome tutorial … I am complete beginner at this and I am currently working on building aTiki statue … so this helped me alot. Polycell doesn’t appear to be sold here. This should create a solvent barrier so you can sand and paint. A perfect covering is done by applying the cover/seal in a thin layer and letting it dry. I have heard that availability does vary by region due to differing insulating needs though. In answer .. yes, I’ve tried Weldbond white Pva type glue in the past .. good, but just a regular form of strong Pva as far as I could tell. Do not press hard on the ball or you will just rub off more styrofoam. Many styrofoam balls already have this line marked by the manufacturer. I found that a Dremel tool and some of the sanding tips allowed for quite a bit of detail. mike1942-f. Lv 5. Either one will work just fine! Made of EPS foam which is a feather light material, making it great for sculptures, modeling, and projects. I have tried it, and while it is OK, it doesn't leave a totally smooth … The other disadvantage of using fillers, especially to repair or alter styrofoam is that when set the filler material reacts very differently to sanding than the surrounding foam. Ribbon 4. resins etc. Have done so .. see my post ‘Cutting smooth holes in foam’ Jan 17. Take the styrofoam ball and make a line of hot glue. 2. It is molded from tiny beads into many shapes like balls, bells, eggs, miniature fruit shapes and more. Want to make cool decorative fabric wrapped styrofoam balls? Step 3 Rub the scrap piece of Styrofoam … For example what works surprisingly well as a bond between flat styrofoam sheets is spraymount, by which I mean the permanent spray-glue types from 3M. No other I’ve tried works as well as this .. sticks well to anything, fairly quick drying, not too tough to sand etc. This test form was made in the same way as one of the components described above .. first rough sanded and then finished with a 120 grit sanding block. That’s a kind of totem isn’t it? Been looking for something like this for ages, great detail and you managed to address ALL of my queries relating to this foam. It is molded from tiny beads into many shapes like polystyrene balls, bells, eggs, miniature fruit shapes and more. 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