I wondered, should I open the cracks up a little bigger with like a sharp knife or something? To give the the putty more to grab on to? Or should I skim over the whole affected area? And If I went the skim route, should I use something like >>>
The putty I have on hand is Evercoat metal glaze polyester finishing putty, Im assuming that might be ok for filling the cracks, but maybe not to skim with?? Trying to figure this all out and I do appreciate the help!!