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Octo
I don't remember the exact name, and I'm too lazy to go in the garage. I think it's Bondo brand. You can find it in any Auto Zone or Home Depot, but make sure you get the stuff that specifically says 'Fiberglass' on it. The regular body filler is only for smoothing out dents and such, kinda like wood putty.
Depending on what you want to make, there are several ways to go: -Large objects (ie. tables, sub boxes, consoles) should be made using fiberglass resin and chopmat/felt. This is much stronger over large areas and costs much less than can after can of fiberglass filler. -Medium sized objects, like stuff around a foot or so, is easy to do with chopmat and molds. Just make a negative relief of what you want and put down some mat, then soak it in resin. When it dries, you have a nice new plastic thingy.... -Smaller stuff with complex curves, like this mask, are good places to use the fiberglass filler. Make a slightly smaller model of what you want, cover it in foil, and glomp on filler. Make sure to go in different directions so the strands aren't linear, and don't add too much. This stuff has a chemical reaction and heats up fast when curing, if you add material on too thick, you get bubbles, which lead to cracks.
Anyways, Google 'fiberglass tutorials', you'll find a ton of pages explaining the process. That's how I learned. Fairly simple, just a little messy and really stinky.
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