DIY Paint Jobs
Yes, fiberglass needs a little extra attn. Absolutely must be cleaned properly. Again - these sites are the place to go:
http://www.autobody101.com/forums/
http://autobodystore.com/forum/index.php
Paint and body is all they're about, search threads for keywords "fiberglass", etc. I'm sure there is plenty of good advise here, but ALL your questions can be answered on paint/body sites.