If you don 't know what the previous owner used on the bottom of the boat, how do you know if the stuff you 're about to put on is compatible?

Last year I put some expensive Micron 66 on the bottom of Toodle-oo! It did well, I was happy when she was hauled last year... but... in reviewing it this Spring, I see that much of the bottom paint is now flaking off. Is this because of an incompatible previous coat, or perhaps because the Micron 66 has dried out over the winter and is now flaking. (Yes, I wish I had paid closer attention last year when she came out of the water...)

If paint is incompatible with the previous layer, does it show that fact immediately upon application?

Thanks,

Bill Balme

We 've bitten the bullet - heading to soda blast the bottom back down the the barrier coat, add a couple coats of new barrier coat and then a nice new covering of Micron 66. What a pain!

The boat is only 5 years old, so it 's surprising that I find myself in this predicament so early - but it 's because of a misapplication at some point in her past. Now I just have to make sure I don 't go adding more than I need to each year (or whenever)... How does one judge when it 's time for new antifouling - or are you like me and throw another coat on each year?

Bill Balme