I think you are assuming the rod in the engine now is still good but has worn away some of the bronze. Most often thats not the case at all. It is much more likely that the rodend and bushing have been stretched out of shape and will eventually fail. The aluminum and bronze are both relatively soft metals, they stretch a little before cracking and complete failure. Change the rod before there is a hole in the block. It was the brass foil sheets that made me laugh.