priming aluminum

[ReelToy]

I forgot I did have my bracket sandblasted before anodizing and powder coating. If I could figure out how to post pictures I could show there are no chips or flaking after 15 years. The only spots I have seen on it are where it was bolted up on my old boat with 5200 and you can't see them. I've even dropped downrigger weights on it with no damage.

[3rdday]

Whatever you do, do not use a polyester gelcoat. It is hydroscopic.

[BigLew]

Whatever you do, do not use a polyester gelcoat. It is hydroscopic.

I'm sorry, but I am not familiar with "hydroscopic." Hydrophyllic and hydrophobic yes but, Hydordroscopic no. What does that mean? Maybe, water will penetrate through it?

[Blue_Heron]

I'm sorry, but I am not familiar with "hydroscopic." Hydrophyllic and hydrophobic yes but, Hydordroscopic no. What does that mean? Maybe, water will penetrate through it?

Couldn't find "hydroscopic", but how 'bout this:

hy·gro·scop·ic
adj
Definition of HYGROSCOPIC
1: readily taking up and retaining moisture
2: taken up and retained under some conditions of humidity and temperature <hygroscopic water in clay>
— hy·gro·scop·ic·i·ty\ noun

Dave

[3rdday]

yes, you are correct, I fat fingered the "d" in lieu of the g. Hygroscopic. Ovviously, choose the polymer that is least hygroscopic. Or, one that is most hydrophobic.