I think you've described the method Compomotive used to seal my wheels. The first time I saw that, I thought it was overkill but now I figure they knew what they were doing!
I don't think I've had my wheels apart since I got them. Actually, I changed the width and maybe the offset of my front wheels but I had Compomotive do that for me when they still supported modular wheels. When I had my wheel straightened, I don't THINK they took the wheel apart, but they may have. When I've gotten new tires, they used a regular tire machine.