Paint Blisters | Another Test

If you have been following this build for the last couple of years you will be aware that all the white paint on the boat blistered when exposed to water (i.e. rain) when it was moved onto its trailer late in 2023.

Nobody, including the paint manufacturer, could tell me why. But I eventually worked it out.

At least I think I did...

The technical instructions for the paint tell us to use the manufacturer's own specific thinners to clean brushes and rollers.

I didn't do that. I used a water-based brush cleaner. I meticulously cleaned my brushes and rollers with this stuff, and reused them time and time again.

In doing so I am sure that I impregnated them with whatever solvent is in the brush cleaner, and they in turn contaminated the paint.

When the paint became wet the water caused the contaminant to reactivate, blistering the paint.

It only affected the white paint. The blue paint was fine, so it's clearly something in the white gloss that is intolerant.

I decided to test my theory while there was still plenty of the old paint on the boat, and poured a few cups of water into the forward deck well.

I left it overnight, and sure enough all the paint covered by the water had blistered.

Here is a close up pic of the blisters.

Horrible!

Here is another pic with a ruler for scale.

You can see that the blisters are tiny, but can you imagine what the boat would look like covered in a rash like this?

I can, and that's why I am repainting with Epifanes!