I wouldn't unsafe... the bumper skin never protects you anyways, its the re-bar and shocks behind it that do the impact. I"m just saying that if you scrape a curb with fiberglass... it'll crack right away opposed to urethane (stock material) which flexes. The fiberglass bumbers are also A LOT more prone to stone chips... you'll need to install a 3M Armourguard coating right after painting to save it.
My YouTube video
-- RANDY SPARRE --