I've touched up a stone chip on my stinky frame with acrylic paint. It was a tiny detail though but i'm still worried that the paint could potentially eat through the metal. Did i just f*ck up or there's no risk involved?
Acrylic paint is water based, and contains nothing corrosive or harmful to aluminum. The only real downside with using acrylic is it isn't a very durable and can easily be scratched off. For touchups I would recommend an enamel paint (ie. car model paint you used when you were a kid) or nail polish because they are more durable and just as easily to use as acrylic. Just be sure to take care of your brushes, you will need paint thinner.