I picked up this old Waterloo roller a couple of days ago from CL. A few of you guys correctly IDd the box as an early 70s model- it is stamped, "Made in USA 12/71." It is built like a brick **** house! Slides still work great, no dents, just some issues you can see in the middle of the chest- it appears someone broke the lock on it at some time and made a bit of a mess. I cleaned it up, best I could considering the overall state of the box. I don't want ot paint the whole box, but would like to touch up the skid mark up the middle. Any easy way to do that?