Putting a new gel coat on old GRP!

[William_H]

2 pack paint will never stick as well to the original as gelcoat will.

Having refinished 2 aircraft in gelcoat and owned one with a 2 pack refinish I am talking from experience.

8 years on the first regelled aircraft was as good as the day I rolled it out of the workshop. 2 years after repainting the other was showing signs of paint delamination.

Gel coat sticks really well to original laminate when the laminate is applied over the gel coat (building the boat in the mold) and gel coat is still green (hard but not fully cured) However without this chemical bonding ployester does not stick well to anything else including cured polyester. That does not mean it will peel off just that it does not stick as well as ployurethane or epoxy. Mostly it is OK. olewill