A good quality paint stripper will do the job just fine and will not damage the enamel. When using paint stripper it works a lot better if you put a sheet of plastic over it once the stripper has been applied. This traps the solvents in and it works a lot better. I have used cling wrap, known as Glad Wrap in this part of the world and it works a treat. Leave it on for for about 1/2 hour and you should be able the brush the paint out of the chips with a stiff brush. If there is still paint in them just re-apply more stripper and put the cling wrap back on, repeat as many times as it takes to get rid of the paint.
Allan.