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From: (no name) (no email)
Date: Wed Sep 01 2004 - 12:01:00 EDT
In a message dated 9/1/04 12:37:06 AM, Bob Austin writes:
<< I second Keiths caution against sand blasting. It is very destructive, in
removing the gel coat, it also opens up the fibers of glass and leaves sand
enbeded. I have seen a number of boats which were blister free develop
blisters shortly after blasting.
Soda blasting and wallnut shell blasting is much safer--as is using a chemical
peeling agent. >>
Again, I agree with Bob - almost.
Sand blasting opens pores in the gel coat which can accelerate a tendency to
blister. If you do sandblast it would be wise to recoat with a barrier paint
such as Interprotect, following the recommended application schedule. This
would be a good idea anyway once you get the paint off.
If the boat is hauled every two years, it may be better to repaint with a
multiseason ablative paint such as APC-50 or Micron rather than using a hard
paint like Trinidad. The ablative paint is self polishing and will wear off over
the two year period, minimizing the amount of sanding necessary when
repainting. Multiple coats of Trinidad will eventually flake off leaving a rough bottom.
Eventually it will all have to be removed again - putting you back to square
one.
Larry Z
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