A question:
My boat has a few places on the mast where the paint is "bubbling up" - that is, the paint has sort of blistered up, and is/can flake away.
One of the places this is happening is down below, near the cabin sole. I assume this is from water running down the inside of the mast - but what concerns me is that behind the paint there is a chalk like substance that I can pick away at - what is that stuff? The mast is aluminum - so it's not supposed to be corroding.... What is that stuff - and can I just sand it down and paint it - or is there cause for real concern?
Thanks,
My boat has a few places on the mast where the paint is "bubbling up" - that is, the paint has sort of blistered up, and is/can flake away.
One of the places this is happening is down below, near the cabin sole. I assume this is from water running down the inside of the mast - but what concerns me is that behind the paint there is a chalk like substance that I can pick away at - what is that stuff? The mast is aluminum - so it's not supposed to be corroding.... What is that stuff - and can I just sand it down and paint it - or is there cause for real concern?
Thanks,