Damaged Pistons. Reuse?

[sleepydsm]

I bought my car knowing it had broken the timing belt once before, and so I wasn't surprised to see the nicks on the pistons from the valves when I did my ARP studs. I just left them there, and obviously the car didn't start on fire or explode. Now that I'm rebuilding my engine (ghetto stock rebuild) I was wondering if I could get by with just deburring and smoothing out the nicks on the pistons. Or will the uncoated part of the pistons create hot spots, and therefore premature detonation? Or, can I clean up the pistons and have a car that will be OK?