So this has come up more then a few times. its good for small parts for. Iv done a whole frame with good results.
this is the stuff I use. its cheaper then aircraft stripper and the same brand.
super easy to use. just make sure you use gloves and be in a well ventilated area. I just brush it on.
give it some time. the magic will happen soon.
when it gets to the point that is peels off just wash it off with H20 and a wire brush. if you really tuff areas give it another round. I have done this same process with a complete frame. brush on and used a pressure washer to get the paint or powder coat off. repeat as needed. the frame took me 3 rounds at about an hour total.