I hope to be starting body work on my T soon and know very little about finshing fiberglass. I have a long seam aroung the top of my body where the interior insert was glued in. I saw a show recently about spraying gel coat over filler to keep seams from showing through the paint.

Is this something that needs to be done? If so, can gel coat be shot with a regular gravity fed gun? Any tips on fiberglass prep and painting would be greatly appreciated.

My paint experience is limited(very limited) to body work, primer and prep on metal. I've painted small parts before and hope to make this my first complete paint job.