fiberglass, polyurethane.. what's the difference?

[nonovurbizniz]

Originally posted by 93Honda
ya if you damage a urethane part, you have to replace the whole thing, but fiberglass is easy to repair, but also extremely flimsy and easily breakable. Take a look at a stock civic's bumpers they are made of fiberglass, really crappy.

Uh... no they're not..

my 93 civic has a urethane stock front and rear bumper... hardly ANY companies use fiberglass... when they do it's generally for body parts to drop weight not bumpers... it's much easier to mass produce molded plastics then molded fiberglass.. flat shapes are easy with fiberglass but moded ones' are realatively labor intensive.