On Sat, 19 Nov 2016 19:08:21 -0000 (UTC), Robert Bannon
wrote:

On Sat, 19 Nov 2016 08:30:51 -0500, Frank wrote:

+ He does not know that I am a retired chemist. I survived many fires
and explosions and release of toxic materials in the lab so I sorta know
what I am talking about. Then from the technical side, if the gasoline
is diluted the polar characteristics will change and it may not function
the same.

That's interesting that you're a retired chemist.
My chemistry training stopped after Organic Chemistry (Morrison and Boyd) in
college.

Water is polar.
But are you sure gasoline is polar?

There must be a good reason gasoline is the best solvent for removing label
goop, so, if you're saying the reason is its polarity, all we need to do is
find a solvent with similar polarity.

But I've never found a solvent better than gasoline for removing the
underlying goop (although no one solvent works at all times).

I'll google to see if gasoline is polar, but it may get complex because
there is no one "chemical" called "gasoline". It's a mix of alkanes,
alkenes, alkynes and aromatics (but I'll doublecheck since that's off the
cuff).
The reason one solvent doesn't work all the time is there are so
many "glues" used to attach labels.