Any way to get dents out of steel tube handlebars? I have an old cross brace handlebar from the 20's but it has some dents in the tubing (the bars are straight, I'm talking about there being actually pushed in dents). Any way to get these out? I was thinking a steel ball the size of the inner diameter forced through but I'm not sure where to find a steel ball like that or how to get it through since the bars are not straight across (hard to get around the bends...) Any help?