Originally Posted by Ryban
I've been sanding
my topsides in prep for new paint. Some areas were flaking from excess mechanical abrasion, and those areas I've sanded the chalky white paint completely away... at least I think it's paint. I know there's gel coat on the boat
, I just don't know where the paint ends and the gelcoat
There are some places that show a yellow or even orange color beneath the paint. But most places just appear off-white or beige.
A few asides:
1. I wasn't sure if I should sand out the scratches completely, or fill them with a filling compound and then fair the surface?
2. There is a grey patch near the water
line, shown in a few of the photos, where it looks like a repair was done. Possible puncture?
finishes is about 25% of my business.
That sure looks like paint to me.
It would appear that there was some boat damage (unknown cause), and rather than repair with gelcoat, the repairs
were filled, faired, and the whole boat painted.
To determine best course of action, the existing paint should be analysed by someone who really knows their stuff. An adhesion test should be performed in several places, to verify the original paint prep and application was completed properly. Then and only then, should the original paint be left on.
If OK, then any FRP repairs
should be performed where abrasion or impact damage goes through the paint and gelcoat.
Then all damage to only the gelcoat and paint layers can be filled with high build primer and sanded fair.
Now you need to perform an adhesion test for a test spot between the old paint and new.
If the new paint of choice will adhere properly to the old paint, then you can just sand, remove dust, and paint.
If the new paint does not adhere well to the old, you will need to prime before painting.