How to sand fiberglass. fiberglass is a type of plastic that is impregnated with small glass fibers for reinforcement (it is also known as grp, for glass-reinforced plastic). fiberglass is lightweight, strong in both compression and tension, and easy to mold into intricate shapes.. Re: the proper way to wet sand a gel coat hull vinegar is an excellent mild solvent. it will not damage the gelcoat and it will remove any of the sanding dust particles on the boat. acetone could be used i guess, but not recommended because it can deteriorate the gelcoat and effect the resins in the hull.. Home boat design forums > construction > boatbuilding > fiberglass and composite boat building > wet sanding with electric sander. discussion in 'fiberglass and composite boat building' started by pescaloco, oct 1, i sealed the vacuum channels on one plate to use for wet sanding and the other for sanding when i want the vacuum. i use a.
Im wet sanding my 83' ranger fiberglass boat to smooth it out and take the clear coat off, then using rubbing compound with a wool pad, then machine polish. thats what i read, what i should do. guess im wonder and idk if you would know.. Use wet and dry sanding (wet) anytime you want to smooth the job with medium or fine grade abrasive and you can get the surface very wet without causing any damage (which is almost always).. 1994 skeeter 200sx faded clear example of a good wet sanding, buffing, polishing and detailing on an older bass boat. but i have to say that this boat was neglected for years and should not have gotten this bad..
