Are the lenses glass or plastic? I'd be very careful about chemicals if they are some kind of plastic. If plastic, you might have better luck wet-sanding with 1200 grit sandpaper to remove the paint, then using the
DoubleHorn Products headlamp restoration kit to remove any scratches and then recoat the lenses.
Why are you removing the paint? Did it not come out very good?
If it's because you didn't get the results you wanted, but still want yellow fogs, you might look into using
Dupli-Color Metalcast Yellow. Some excellent pics of the results
here, and information on how to do it
here.