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From being told on this very forum, there is no difference between 'proper' acetone and acetone nail varnish remover. Yes, I know.
lynx-
For removing a sticky label (or nail varnish) there might not be much difference with some brands - personally I wouldn't risk it for something I want to repair rather than replace.
For any specific brand, there should be a data sheet with ingredients, e.g.
https://www.sainsburys.co.uk/gol-ui/product/sainsburys-/sainsburys-nail-polish-remover-250ml
or even a safety data sheet such as
https://www.leading-solvents.co.uk/uploads/pdf/bcde7472fd4bced3cf7f346d443124eb.pdfGiven that solvent welding usually requires clean surfaces and no contamination, I'd check before introducing something like hydrogenated castor oil to a repair. There will be some nail varnish removers that will work as planned, and I'm probably being over cautious...
MrE
Definitely 'proper' acetone - nail polish remover often has moisturizing oils and other skin friendly contaminants that you do not want if you're solvent welding.
Try the 3D printing thread for ABS slurry recipes?