Quote:
Originally Posted by SuW
Just another mention of the 3M Guide Coat product as a sanding guide. Large carbon powder puff that easily shows up imperfections. You sand the black stuff off until it's gone and then rinse the sanding residue off. It saves a lot of guesswork.
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I hope this is not misplaced. I spent a lot of time prepping the top sides of my SC28 which had been painted white some years ago but suffered from a severe case of 'acne', thousands of small, hollow pimples. Well, I sprayed a coat of
single part urethane over a urethane primer and it looked pretty good. That was a month ago. A couple of days ago I noticed the pox has returned in the form of tiny, as yet at least, pimples.
Weather had been dry when I applied the
paint,
boat has been out of the
water and under cover for years.
Any thoughts on causes and possible remedies?