I've done quite a few tables of various brands around town. Bondo works well on tables and it doesn't take alot either. I've never heard of slate breaking due to Bondo. One can slightly score the bondo with a razor knife before taking the slates apart. Never bend the slate up to seperate it from it's mate. Especially on older pinned slate. Secondly if you're filling any holes out in the playing surface with only wax you're crazy. One ball gets dropped, or bounced on it and you might wind up with a divit. Those should be filled with something harder for this reason alone if you want a good playing table. Wax works well if you need very little to finish a seam off where you can't feel it. Recently I serviced a table that someone else had used wax on. Twice. They installed the table, and came out again a few months later to do over. When I stepped into the room where the table was installed at the end of the home there was also a wood stove in there. Two things came to mind. When I took the table apart you could tell the wax was still soft. Well for the last couple of months the Wife told me that the room was aways at least 75 degress or hotter. Bingo. Forget the wax. Second, how good was the rail rubber after being cooked in this room. I was sweating just being in the room with the thing going. Every mechanic has there ways, and materials. Most will work under normal circumstances. My advice is to look at every job like a new one, and qualify the table, and it's environment. I'm sure Cobra will answer as well on this one. Just take care of the customers and we'll all be better off.