GRP repairs

[Aquagility]

For an effective fibreglass repair is it necessary to-
1 Remove all old paint (will paint stripper affect adhesion)
2 Roughen the surface.
If you've been there, done that, I'll value your advice.

[heathfield]

Remove the adjacent paint by sanding. You wouldn't want the paint to deteriorate later underneath the new repair. Sanding will roughen the area sufficiently.

[Aquagility]

Thanks, heathfield. Just as I thought.

[Bokomoko]

When you have sanded, paint the area with the "magic" Owatrol Oil & also add some to the finish paint...You will be amazed.