Digital Camo Pattern
YO! finally someone has about the same idea as I do. Here's something you could probably do- This is what I plan on doing. Find somewhere (internet or otherwise) that sells ACU pattern duct tape. After fiberglassing and finishing our helmet add strips of the ACU patterned tape. Aligning them as carefully as possible. Then coat the tape in clear protective coating. Thus, you have your ACU patterned equipment.
It sounds silly, but it's just an idea. Its cheap and hopefully effective enough. Good luck on your project though, I'm going to stay on top of this one.
I've done some digital camo work on actual firearms with stuff called dura coat, and if I can make a recommendation, it would be to use painters tape.
Get a roll of 1", cut it down the middle after taking a long strip, and then cut little cubes from those 2 strips. Get a nice base color on your armor first, then stick down those little tabs. Hit it with a second coat, add more tabs, and then a third coat. More tabs, fourth color.
It comes out looking REALLY good if you space it out well enough and can picture what the patterns will look like when you're finished. Just remember that actual camo needs to have discernable shapes to it, or from a distance it just becomes one giant combo of the colors you've put in there. Which is why the ACU sucks so badly. I'd recommend a single dark color (black or dark green), a single light color (khaki, light green, light grey, whatever) and then 2 nice middle ground colors.
The tape will build up, but you'll get some great looking patterns. I wouldn't recommend cutting the tape cubes too small either, it makes for more work and you really do lose definition.
I'd post pics, but this isn't the right forum. Hope this helps and feel free to message me if you'd like to see a sample.
Best of luck, build looks great, and I hope to follow suit here eventually.