Originally Posted by AnnieA
I'd like to ask a highly related question: if the only time I'll use turpentine will be to remove dammar varnish, is the hardware store kind OK?
it is better for removing dammar varnish than artist turp which is more distilled, thus less volatiles than hardware turp.
I would use caution when using acetone/toluene, since they will be more prone to dissolve paint itself, especially thin glazes.
Test a small area with a q-tip whatever you use, it should have little or no paint residue after scrubbing the area.
The degree of varnish solubility will determine what any conservator uses, providing no paint is removed. Varnishes become less soluble with age.
They always start with the lowest solvent dissolving power and then slowly graduate upwards until paint is disturbed, and then stop.
The hierarchy is basically OMS, mineral spirits, turp, mixtures with stronger solvents, etc., but alcohols and acetone will remove paint nicely.
A suspended mixture of turp, denatured alcohol (methanol mix) and water will dissolve paint. I use it to remove paint for repainting.