It is the smae as regular gelcoat.
you just use (aaah shiat can't remember) specific rollers.
I don't know if they have any out there but you can get it from any auto paint stores. Such as Tir City Paint, Advance color coating, or #1 place for me. Diversified Materials out of LaMesa.
Check around before you buy, someone may carry it in better brand and pricing.