[Video] Large Scale Mold Making - Part I

Step 5 Weight

When done, add weight and allow to cure.

Alternatively, use shrink wrap. Just be careful that you're not warping your foam. A few layers should do it ;)

The idea works like a piece of string on your finger. One loop is fine, but each time you wrap around your finger the pressure goes up and up.

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Next up... A whole lot of sanding. Unfortunately, I won't be there for it - so I won't have an awesome video for you. But hopefully the team is taking lots of stills ;)

Comments

[thisisno]

Too bad you weren't there to document the sanding/ post sanding procedure. After sanding, was the foam plug coated with some sort of body filler substance (like Bondo) to smooth out the surface? You may have mentioned this in a subsequent post, but I didn't catch it.

[trebuchet03]

Yes, I will make a post about that process... Not really any pictures (I might be able to dig up some), but I can give details. The plug is sanded to shape... Then coated with fiberglass and resin (no hardener). It's allowed to fully cure (a few days). Then, bondo filler -- sand - bondo - sand - repeat until you've got your shape....