[sailingdog]

Don't use microballons if the scratches are below the waterline. Use colloidial silica..

 

[sailingdog]

SD the pic he put up in the second post looks like it right below the toe rail.

Yes, I'm aware of that... I was just pointing out that below the waterline you don't want to use microballoons.

Guidera if you use the silica make sure you dont leave it very proud of the the surface the silica is like sanding rock, it takes a while, and is very hard to do with out sanding down the surrounding gelcoat

This is true.