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I thought that I would update everyone on the Ethanol 
"research" that I have been doing. I now have three test 
jars set up. One jar has the infamous Jose Cuervo in it. 
The second jar has pure 91 octane gasoline with 5.7% 
ehtanol and the third jar has 91 octane gasohol (same as 
above) but laced with water. 

The Jose Cuervo jar has two samples in it; one is a sample 
of precure that is something I made up several years ago, 
and the other one is from the original kit. Both samples 
have been in the jar for a week. So far, there is no 
noticeable effect on either sample. 

The gasoline-only jar has three samples in it. One sample 
is from the original factory lay-up. One is a brand new 
layup that I did a little over a week ago that was allowed 
to cure for 48 hours. The third sample is from the same 
layup just completed, but was cured in an oven at 200 
degrees for 3 hours. Again, no noticeable effect on any of 
the three samples after one week. This test will go on for 
a while longer just out of my own curiosity. 

The third jar has the water in it. it also has just one 
sample in it, one of the original factory layups. The water 
at the bottom of the jar has turned a light brown color. It 
has clearly leached the alcohol and some other products 
out of the gas as the water level has grown. There is no 
effect on the sample layup, either in the gas or the water 
(I have it standing up in the jar so that part of the sample 
is in the water and part in the gas.)

But the final coup de grace comes from a conversation I 
had with a BP/Arco technical products engineer. He told 
me that first, California currently has a ethanol ratio of 
5.7% but will soon be changing to 10%. He also said that 
the fiberglass tank problem is nearly irrelevant because, 
as ethanol laced gasoline gets colder, the ethanol will 
come out of solution and unless your engine is capable of 
burning pure ethanol, you should avoid using any 
ethanol-laced gasoline at altitude. If you were to ever 
find yourself at very cold temperatures (he didn't specify 
how cold), the likelihood of ethanol coming out of 
solution is very high. 

Now, it also possible (but not probable) that one could 
obtain an exemption from the Air Resources Board to get 
ethanol-free gas for experimental purposes, the 
likelihood of finding someone to sell that small volume is 
nil. 

The engineer also told me that it is possible to leach the 
ethanol out of the fuel. I do not recommend this 
procedure (legal disclaimer). one can leach the ethanol by 
adding water to a tank of fuel, agitating it, then cooling it 
down as far as practicable to ensure that all of the water 
falls out. Then, remove the water layer. If you don't cool 
it down, micro-bubbles will remain in the gasoline that 
will fall out over time. Any takers?

So, at least for now, it seems that the effect of ethanol on 
fiberglass is somewhat moot, despite my inability to see 
any effect on the samples I have in process.