hi d'
part of the o.p. question was using it on POLISHED streams...
which could be interpreted as BARE metal.
in THAT application is would not be HARMFUL,
EFFICACY is another issue.
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on an alcoa clearcoated 'stream i'd have a LOT of questions...
like will it EAT the finish? how about sealant or gaskets or other bits?
it appears this is mostly hydrocarbons and petrol SOLVENTS and a dash of xylene.
once this soup evaporates the 0.1% that remains is a magic resin....
so i dunno.
but it must be a pretty damn magical resin...
to keep the parasites from dragging along on the stream.
IF we ever get them up to near sonic speeds.
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i'm always a tad leary when the makers of magic goops
don't have ANY real technical info under their OWN technical content or website...
but i did find the msds out in space...
http://www.capfinalcoat.com/FCFrench...rpdf/X-606.pdf
and HOW LONG is it supposed to last?
since reapplication is a ventilation/protection/meltyerbrain issue...
i'd opt for a detailed application of a good quality automotive sealant.
these DO last a year or more and are safe for the owner to use, proven and widely available...
see some of the MANY threads on waxes, sealants and detailing modern streams, here.
now, would i let the DEALER apply a sealant/wax?
probably not, since doing this PROPERLY takes 8-12 hours on a longer stream...
or u can go for a coating of free magic goop.
cheers
2air'