One area I find interesting is the different solvents we use for different purposes. Thought I'd list a few and see if we can create a comprehensive list of different types and the uses people have made of them.
Methylated Spirits
Turps
Acetone - probably a bit risky on any sort of paint or art, but good on metal
Eucalyptus oil - found it excellent in removing ball swirl with a magic eraser
White Spirits - removed some glues metho didn't
Anyone got good uses/do not use advice on the above and other solvents?