PU & varnish

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25,987
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Upstate NY
I have read a few posts here stating that PU will to some extent clean off varnish from engines. That is not an easy task and few if any oil additives do a decent job there. I guess I am asking is it kind of an accepted fact that PU will indeed clean off varnish, more so than say PP?
 

Donald

Thread starter
Messages
25,987
Location
Upstate NY
Originally Posted By: GumbyJarvis
Is varnish really all that bad?
Probably not and some confuse varnish with stained aluminum parts. But if PU will remove it, and I can afford the extra few dollars for a 5 QT jug, then why not.
 
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