Re: Dracks Ironman MK VI Build. (page1 includes info on foam armour building)
Hey guys, I'm one of the people Drack was talking about who had various issues using plasti-dip. Thought I'd sum up the lessons I've learned to simplify things
I bought two kinds of the stuff, 200g/200ml cans and the spray version. These are the only options I've had available in my country.
I've used the standard EVA foam 10mm sheets and also 2mm and 4mm craft foam I've got through Ebay; for the paint job I've used Montana Gold acrylic spray paint. No pictures yet for two reasons - it's not done yet, and I don't want to hijack this thread
The can version:
Maybe it's because of the small size, but at first I've had brush marks show up on the foam that didn't level even after drying. It's annoying because it doesn't look good and it wastes material.
Then I've bought the official plasti-dip thinner and started to add it to the can. You need to find a very fine balance here, because if you use too much then the stuff will become runny and drip off the piece you're coating; it may also give you a far too thin coat. But if you get it right it will be a lot smoother and you won't get brush marks.
For the 200ml can I'd say the proper mix is about an additional 20% of thinner.
Also make sure to either clean your brush 2-4 times or swap it to a new one. I've found that the thinner melts plastic cups so you can't use them to clean the brush. Drack has suggested using turpentine for cleaning, but I haven't been able to get hold of it so far.
The spray version:
It's proportionally more expensive to go with this one, I'd say you'll get about 30-50% of the coverage because the 400ml spray has the aerosol filler stuff too.
There are two reasons why you'd still might want to get it, though.
First of all I've found that craft foam doesn't like the brush-on version of plasti dip at all. It just doesn't stick to its surface and you'll end up with a brush marked, half-covered surface, even if you thin the stuff to get better viscosity. However the spray version behaves a lot better and it can create a nice even coat.
But, if you don't use enough, it'll get bubbles and ruin the surface. Also, for some reason the sprayed plasti-dip seems to contract a little as it dries, and if your glue job wasn't strong enough, it'll peal off the craft foam from its base.
The second reason to go for it is that spraying is much much faster than brushing, so if you're under a deadline like I am, it's a good trade off of money vs. time.
The acrylic spray paint I've used seem to stick very well to the plasti-dip, however I haven't tried to bend the pieces or abuse them in any other way yet
It also makes the pieces a little more rigid, but I haven't really put them through a stress test and I don't plan to
So, I'd recommend using plasti-dip for a foam costume as a start, especially if it's easily available in your area. Haven't tried the PVA glue approach yet, but as I hear it's not flexible and more prone to cracking...
Using some kind of plastic coating would definitely get you better (smoother) surfaces, but getting hold of Smooth-On products in your area might be problematic (my nearest retailer is 600kms away), and the process would probably take longer; not sure about costs though, PD can add up on a larger piece.
In the end, it comes down to this:
- if you have craft foam on your armor, you'll need 1-2 cans of the spray version
- if you only use 8-10mm foam mats (Iron Man armors only need this I guess) then you'll probably be okay with 600-1000g of the brush-on version.
Drack's 2,5l can is definitely good value though
Hope this helps...