phase 1

[NILS]

I picked up a 1972 23 cc last august. best cc i've ever owned, no need for my 23 contender anymore. Because i want this to be my last cc for a very long time i decided to barrier coat the bottom as my first project. I just about have the bottom stripped 95% done. What i've encountered is hundreds of blisters in various shapes and sizes. Can someone offer advice as to, do all blisters have to be ground out, some of them are small and seem to be more of a crack. i've got some pictures for viewing pleasure,grinding the bottom was NO pleasure. Any help would be greatly appreciated .Also what tools work the best for grinding out the blisters, when i used my grinder i found i was taking more bottom then blister. Thanks again