Just buy a bottle of proper acetone
In the uk pharmacies have it behind the counter and you have to ask. Not expensive for a 500ml bottle. Nail polish acetone tends to have additives over here not sure about other countries though. Acetone is also used for fibreglass repairs so if your near the sea shops for boat parts may have it.
I'll give you a little story to illustrate this.
I was planning on following the Travellers secretive TAFVR (toes and fingers varnish removal) TEK and this called for pure acetone. I walk into Superdrug (yes it is really called that) and see some "100% pure" acetone nail polish remover. Now me being the sceptical person I am I read the back and it had an ingredients list. Obviously acetone is the only ingredient in pure acetone so the presence of a list of multiple ingredients put me off and I left empty handed.
What had happened?
Superdrug uses "100% pure" as a brand name for some of there products. Why? Im guessing clandestine chemists are not there target market and people who think the words "100% pure" makes something more natural, appealing and better for you are.
The phrase MSDS (material safety data sheet) is your friend on google. If you find a appealing looking source for a chemical or solvent you have an interest in acquiring just type in the brand name and product followed by the phrase MSDS and you should easily find out what said product actually contains. The MSDS is a legal requirement and is not full of marketing hype like "100% pure" or "double strength formula" just a list of actual ingredients and the safety information with regards to those said ingredients.
I ended up just phoning a couple of local chemists and asking if they had any 500ml bottles of acetone. Two phone calls later and I had a bottle of pharmacy grade acetone to wash the resin of my tools after fixing the fibreglass bumper on my car. I didn't mention the TAFVR TEK for obvious reasons.
Good luck with your hunt.
