It should be fine to hold up to boffer combat as long as there aren't small/spindly pieces coming off of it that could snap. Especially as a breastplate or bracers, it should work. I recommend backing it with EVA foam for stability; probably 1/2" to 1" thick, depending on the location, how flush it is against your body, and how much damage you think it will sustain.
OOG: Zelda Turqman