Painting aluminum boat bottom

[Shadow Jr.]

Should these white spots be an issue to paint over? Thoughts would be appreciated.

 

[airshot]

Do they come off easily ?? If so then they will lift and take the paint with it. If they are attached then just a scuff to ruff the surface and paint.

 

[Shadow Jr.]

Do they come off easily ?? If so then they will lift and take the paint with it. If they are attached then just a scuff to ruff the surface and paint.

They seem to be deep. I've had to take a wire wheel with some effort to remove them. Didn't know if it was something to worry about or not. Thanks for the reply

 

[LDUBS]

What are they? Seems the bottom was painted before. Is that primer showing through?

 

[TriBull]

In case it’s corrosion, I would use a power washer on it first, then etch and/or use a etching primer before applying your final coats.

 

[LaqueRatt]

I'd take a DA to it with some 80 grit. If they come off, they come off. If not prime and paint.

 

[lckstckn2smknbrls]

Sand were needed just in case then etching primer, primer and top coat.