It really depends on the set and how good you are at modifying stuff.
A number of productions have tried using this for futuristic armour and people just go, "Oh look, they're using Alpinestars MX with Tuareg shoulders and Hiprotec bits, just painted green...".
It could look great, it could look naff...
But post some piccies up and we'll see if we can help.
Kevin Burton here, for example, has an excellent set made from sports armour (Ice Hockey or American Football, I think), so such things are pretty feasible!
