There is a limit Chris. I tried it once on a heavily pitted item. The plater put loads of copper on, but it just peeled off again.
I did manage to scratch it whilst fiddling it in place, and as I'm using a different plater now and as I have a few lever parts ready for dull chrome, I might as well ask their opinion.
But I always try to avoid the polishing guys if I can....They can seriously ruin your day and your parts!
Ron