Re: Stormtrooper pepakura build by first-time costumer - fiberglass done!
Thanks for the suggestions, everyone! If anything, I thought I used too
much hardener. I've been using what will be throw-away measuring spoons, and have been a little generous with the hardener after my first attempt too forever to dry.
The Smooth-Cast 320 arrived Friday, so I sat down and did some experimenting with it. Wow, they are not kidding about that 3 minute pot life. I'm definitely going with the 321 next time. I mixed 1/3 cup A to 1/3 cup B, thinking that to be a good enough amount to go through in short order. Boy, was I wrong. This is what I ended up with: a rock-solid lump in the bottom of my cup.
After that disaster, I cut the amount down by half. Still way too much. Now I'm mixing 1/2 - 1 tablespoon of parts A to B, and it's working great. The only thing is you go through brushes like there's no tomorrow.
I started slush casting the inside of pieces and it is SO much nicer! I still need to brush the edges, but at least I don't burn through brushes, and it comes out nice and smooth and relatively free of bubbles, unlike this...
It's truly awesome how quickly this stuff cures, though, and there are hardly any fumes when working with it, and none after 10 minutes of drying. It makes doing multiple, smaller passes that much easier. I'm also applying a coat of this to the interior and exterior of the helmet. There is absolutely no tackiness to this stuff even after 10 minutes, and it'll (hopefully) mask the residual fumes that were hanging around my bucket.
I did have it outside a few days on our covered balcony, but the weather's turned cold and has been very damp outside, so I'm sure that didn't aid in the curing process. Had I known about the UV light thing, I could have hijacked my bearded dragon's UV tube after he went to sleep.
Here are the two hand plates and cod piece with their first round of Smooth-Cast.
Aaaaand, I finally did what I've been putting off for over a week now: trimming away the excess fiberglass from the helmet, smoothing it down where it was obnoxiously bubbled, and getting ready to Bondo the piece.
I'm finally going to get some decent sanding discs... This is one of the cheapies that came with the rotary tool, and they really suck. Not even 10 seconds in and it shatters into piece. Glad I wear safety goggles when working with this!
Ahh, nice and smooth! Switched to the sanding drum and it went so much easier.
Just a little more work around the mouth area once I get some new discs to get in the tight spots.
Tomorrow it's time for some last-minute touch ups of Smooth-Cast on the bucket, then time to Bondo! Gotta get cracking on this piece and stop procrastinating. Again, thanks to everyone for your encouragement, feedback, and tips! As always, it's a never-ending learning process.
