Yeah, Bobamaker's items are fiberglass, and they come trimmer, and primered, ready for paint. They are 100% top knotch work, and worth every penny, and then some...
Fiberglass is easy to paint, as it accepts nearly every paint available. Plastic armours can be tricky, and you need to be sure that your primer adheres well on the plastic, or you risk the paint peeling off.
Fiberglass, as it's name says, contains glass, which is derived from stone, so it will be more heavier than most plastics.
Bobamaker also offers painting service, byt the price is what it is. As with his work, the paintjob is first rate, and complicated. If you are in a budjet, take the download instructions, and make yourself armour from thrashcans as adviced, and practice on those.
If you want everything made to wear, and accurate, please remember the rule of three. Quality, Time, and Price. Two you can have, but not all three...
I am on the way with Quality and Price. Time, is the factor that has to go... Fortunately, I am not in a hurry to get my Fett in line...