Thought I'd try some in the Delica, a tiny splash in the bio. Trying now to work out whether it seems smoother because I'm psychologically wanting it to be that way (or because I just replaced an upper arm ball joint and it no longer makes nasty scraping noises for every bump)?
I think Dick tried some in his Delica with no obvious effect which really is what I'm expecting

Isn't the standard line that it works for some people but not others? And some argument about spray pattern and aided atomisation? I can't see how so little acetone would have any effect.