Paint on aluminium window frames

[cinderella]

Previous owner has painted the window trims in some sort of crappy stain or varnish or something. I am currently painting over the wooden trims, but dont know what to use to clean the aluminium frames, as he has painted half of these as well. Looks like its been there for a while.

Can anyone tell me the best thing to use, which wont hurt the frames.

Thanks

[petersemple]

Not an expert....but

Have used metho to take off old acrylic paint before. You know it's acrylic if metho takes it off. I would try a gently scraping and then try metho. If the metho doesn't work then it's not acrylic. I guess there would be a paint stripper that would do it, but I'd be worried about nearby paintwork - unless you're about to do that too

peter