I didn't have any nasty chips, but the surface was quite rough and dirt was caught clouding the lenses.
The process is a bit like T-cutting, polishing out the roughness. I would hope that with the surface smoothed out it will help keep the lenses clear long term, but a bit like claying and polishing paintwork, it will probably be best to do it on a regular basis.
I would say that a day later after the polish has dried out, there is still more work to be done, but it is without a doubt better than it was.