i think i saw you in the city last saturday if that was you lol, but the thing is fiber glass is something that most people never want to touch its really hard to get the paint correct on it, you best bet is to have it professionally done if your not a spray painter, reason is like i said its really challenging alot of effort sanding priming goes into it if you want it to come out mint. i had a mate with a s15 fiber glass vertex rear bar, was a absolute night mare to paint....
I guess you could always give it a go your self and if it doesnt work out get someone els to do it ( painter )
Hope this helped

Alex