Hey Nick,
Welcome. So as a person that went the same route as you're looking into (finished ASP for all my armor plates) I'll say this, fiber glassing the the backing on my parts I felt needed it was one of the quicker steps in my build. The strapping process took much longer and there really isn't a way to have that done before its in your hands.
That said its fairly easy. Its really as simple as cutting the sheets to shape, mixing the resin, and painting it on and being careful to not have it drip on to the finish. All told it took a few hours, and when its 45min to suit up, thats not bad at all.
Hope you stick with it which ever way you go, Death Trooper is a complex kit to but its quiet rewarding to have it on and stride out with it.