Battled this in everyway possible, cryo, manual destruction, acids, etc...all to no avail. Recently started getting Pulsed Dye Laser treatment and it seems to be working!
I've gone through 2 treatments so far and my Dr. thinks we can be done with a 3rd. I'm very optimistic.
Best is that no scarring and not very painful.
It is hard to find a Dr. to do it but I found one and my insurance is paying for it! My Dr. is at a photomedicine center in Colorado and specializes in laser treatment. Find someone in your area that does this, it works I think. Especially if you only have a few MCs - knock them out before they spread.