fibreglass repairs and painting

[Aussie John]

Do I have to scuff up the surface of the repair before using bodyfiller and do I have to use an etch primer before or after the filler? John.

[Ren32]

Hi,

When repairing fibreglass, I've always just sanded to key the surface prior to filling. I don't see that there would be much benefit in etch priming a surface beforehand. When painting the surface afterwards, you would want to etch prime though, especially for the areas where you blend the repair onto the fibreglass (assuming it's a spot repair) normal primer just won't adhere as well to the fibreglass.

Hope this helps,

Darren.

[Aussie John]

Thanks Darren, appreciate the help, John.