Thanks for all the great advice. I have completed to job apart from a
couple of areas still causing some grief. It turned out that the area I
was using as the test section, has some type of surface contamination.
I went over the whole hull again with 180 grit paper and the epoxy went
on fine apart from this one area, the trouble is you don't know until
you apply the resin. It looks like from the overall pattern that at
some stage something was spilt on that hull section. I have removed the
epoxy, re-sanded, cleaned, and re-sanded again, but I still get the
same result. It would be good to get some type of surface analyse done
to see what's impregnated the gelcoat ??????????

On 9 Mar 2005 19:40:12 -0800, wrote:

Thanks for all the great advice. I have completed to job apart from a
couple of areas still causing some grief. It turned out that the area I
was using as the test section, has some type of surface contamination.
I went over the whole hull again with 180 grit paper and the epoxy went
on fine apart from this one area, the trouble is you don't know until
you apply the resin. It looks like from the overall pattern that at
some stage something was spilt on that hull section. I have removed the
epoxy, re-sanded, cleaned, and re-sanded again, but I still get the
same result. It would be good to get some type of surface analyse done
to see what's impregnated the gelcoat ??????????

Hi,

Try cleaning a test patch with 'silicone eater' to see if that helps.

cheers,
Pete.

Pete C wrote:

On 9 Mar 2005 19:40:12 -0800, wrote:

Thanks for all the great advice. I have completed to job apart from a
couple of areas still causing some grief. It turned out that the area I
was using as the test section, has some type of surface contamination.
I went over the whole hull again with 180 grit paper and the epoxy went
on fine apart from this one area, the trouble is you don't know until
you apply the resin. It looks like from the overall pattern that at
some stage something was spilt on that hull section. I have removed the
epoxy, re-sanded, cleaned, and re-sanded again, but I still get the
same result. It would be good to get some type of surface analyse done
to see what's impregnated the gelcoat ??????????

Hi,

Try cleaning a test patch with 'silicone eater' to see if that helps.

cheers,
Pete.

Probably spray on car silicon car wax applied for the shine. Might even be
coats of 409 cleaner......

paul


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On 27 Feb 2005 19:13:58 -0800, wrote:

Am I missing something? IMO this sound like solvent pop. He said it
wiped down with acetone, then applied epoxy. If the acetone had not
evaporated before application it would cause what I've always seen
referred to as "solvent pop." It happens to auto painters all the
time when they wipe down with lacquer thinner and then immediately
start shooting. From his description I do not see how it could be
anything else. Don't be afraid of offending me if you think this is a
mistaken diagnosis.

Joe