I swear there was a recent thread about this and the consensus of the people that have worked with 753 was that it wasn't a good idea. It's heat treated not so exotic steel, which means the force required to dimple is higher. I have not had good success bending heat treated steel tubes, but that's not quite the same thing. Denting it was part of the lack of success.
In general, you can damage a chain stay by dimpling it. And it also may break later.