I recently got a shell and I don’t know if its a gel coat or what but it has a thing gummy tacky layer on it that prevents me from sanding.
I did the normal to clean it, dawn dish soap, hot water and a scrub brush, but didn’t really help.
Anyone got tips or suggestions?
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Who’s shell did you get? Perhaps you can talk with them?
Baby powder will take care of it if it’s just tacky to the touch. but if it’s soft, theres some issues with the resin being uncured.
If the person that cast the shell used unwaxed resin, it will most likely remain a little tacky unless you do the baby powder trick. waxed fiberglass resin, has a waxed addative that floats to the surface and seals it off from the air, do you don’t feel the tackiness.
Yeah baby powder will stop the tackiness. If you were going to paint it, that would probably stop it too.
Brushing on some resin hardener should help also
I’ve tried this but it didn’t help, since it wasn’t a problem of uncured resin. It usually just the fact that fiberglass resin doesn’t like air, which is why they have the wax additive. its usually thought of as a finishing resin, where unwaxed is general layup resin.
Flowcoat / topcoat (waxed resin) is mainly for repair jobs. Because the wax rises to the surface once cured it wouldn’t be useful in our application i.e into a mould. The wax would rise to the surface and be on the wrong side of the layer, then the bond between the flowcoat and subsequent layers of resin & glass wouldn’t stick as well as it would to gelcoat.
You’d only really use a waxed resin when doing a repair and it needs to be painted on top of the existing glass (hence the name topcoat)
Lawrence