Reply by CaptainKlutz

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Posted on Old Denatured Alcohol is milky, ok to use?

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1357 posts in 1883 days

#1 posted 11-16-2018 08:51 PM

+1 do not use it.
If alcohol is not clear, then it is contaminated with more water than alcohol can dissolve into solution, and likely won’t even burn. If it has color, that is likely rusty water from can. Pour it out in your rock garden and dispose of it. (water and alcohol will evaporate :)

Best box store alcohol for dissolving shellac is Kleen strip brand 'green' variety.
Many of the other commercial types use denature chemical that does not dissolve the shellac flakes. They work, but are not optimum and create more sludge that needs to filtered.

IMHO – Best solvent(s) for shellac are either Behkol from Mowhwak/Behlen or 100% ethanol grain alcohol from liquor store. Just wished drinkable grain alcohol was not 2x-4x more expensive than denatured alcohol camp stove fuel. :)

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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