Plastic padding gelcoat filler is really just an easily available, easy to use quick fix.
Best way is to purchase a small amount of white gelcoat , add wax solution & thickener (if required), and apply.
Alternatively buy white flowcoat (this has the wax in already) Wax makes the gelcoat cure on the outside - or it will always remain slightly tacky.
This should not yellow like PP does.
good luck.
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