| Hull painting
Al as you know we did paint the hull and all exposed aluminum after sandblasting. I cannot remember the chemical used to etch or prime the aluminum after blasting but it was done. Next came a layer of zinc chromate followed by a 2 part coal tar epoxy and the layers of bottom paint were last.
It has been 3 years since repainting and there is no issue whatsoever with any fairing cracking, or bottom coat peeling away.
As you know we are re-shafting to 1-3/4" this spring. To clean the tubes and paint the interior was a perfect fit for this project. I used a sanding pad disc made of many sheets of paper mounted on a long shaft to my portable drill and cleaned out the tube. I then ran a paint pad pulled by string through the tube soaked in acetone to pull all residue out. I gave it 5 minutes to dry and the pulled another sponge soaled in sinc chromate. I pulled it from both ends so it passed by all points 2 times. I repeated it with the coal tar epoxy and made it a 2 coat application. I will not use a bottom coat inside the tubes. Good luck with your job!
Mark
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