I have a bio helemt made of fiberglass resin. It has a small hairline crack in it and a small chip from the top broke off. Could anyone tell how and what I should use to get this helmet back to looking the best I can. Thanks
You could try Bondo for both filling the missing chip section and re-enforcing the helmet crack on the underside. If the Bio is already painted and finished maybe you could incorporate the damage into your character. Accentuate the chip and make the hairline crack an alien tail scratch.