I cannot help with any specifics regrading AK products, I used hairspray, Tamiya acrylic, and Testors MM enamel on my chipping attempt. Mine was also a south-Pacific example, those models are where maximum weathering is appropriate (IMO).

But one thing I can say is start with the softest most gentle tool/method you have. Work your way up into harder/sharper tools only if needed.

Escalation is easy, so is going too far too soon ;-)