Hello,
I was given the hull which I used for my J Class yacht.
The hull was fibreglass, never been finished, it had a hard life before it was in my hands.
Many scratches and dents all along the sides of the hull, where it had been laid on floors etc.
I sanded all over the hull to get down to the Gelcoat, going through it in a lot of places.
There was different layers of paint in the bottoms of the dents and scratches - - not sure what type of paints !!.
I bought some" Spray Putty" from Halfords and sprayed the whole hull with it.
The Spray Putty is an alarming bright Orange!!, but is says on the tin it will cover easily.
Fab Stuff !!, rubs down dead easy, filled all the dents and scratches, I was well pleased!.
Hoping all would be well with the finish coats of paint, I sprayed the underside of the hull.
Perfect!, did a few more coats to get things looking better, left it to dry for a few days, then got to work with my "T Cut" to get rid of the errors - - there were a lot of them!!.
Spot on finish, not like a Piano, but very like a Boat!!.
John.