[Laurence]

What one would think from appearance to be corrosion is solid as normal steel. The yard had a grinder and sander on this and all is solid. Any ideas?

[Laurence]

Just launched after new Awlgrip and bottom paint:

[alloyed2sea]

Truly one-of-a-kind - the "fast offshore patrol boat" of the Roamer Fleet.
Only seen two others nearly as good - here's "Hull #6":
Cheers!
Eric

[alloyed2sea]

Including the nearly similar sister ship-type, Commodore.

[Laurence]

Thanks for the kind words about "Navicula". Always an ongoing project:
[IMG][/IMG]

[slooperca]

Originally Posted by Laurence

What one would think from appearance to be corrosion is solid as normal steel. The yard had a grinder and sander on this and all is solid. Any ideas?

I have been in the coatings biz for 25 years. If you are referring to the blisters below the green tape line, it is adhesion problems and osmotic blisters. Most likely cause is poor surface prep and poor adhesion to the layer below. It could also be poorly/impoper cured paint causing water permeability, if it is a two component paint system. Like a bad mix of epoxy/hardner?? Has it lost complete adhesion to the surface or is it lost adhesion between the layers? hard to tell much more without examining the surface and looking at the backside of the layer of paint that is loose.