I was looking at a friend's antique tractor. An early Oil-Pull. As you can see it has never been screwed with, still has the original paint. It's more valuable in that condition and certinally looks a heck of a lot more interesting than if it had been taken apart and sandblated and painted and etc.. At that time it occured to me that this wisdom certinally applies to old guns. In ten minutes a fool can make a "hanger" out of what was an expensive antique firearm. ["Look, I cleaned it up real nice with steel wool!"] It also occured to me that a nice, complete, original, old mini very often should NOT be screwed with. Anyone can paint a collectable mini bike and otherwise 'pimp it up' like a French tart. But when that's done there is no going back. The original patina cannot be recovered. I know there are no hard and fast rules here but it is something to consider before that urge to "improve" the looks of that vintage, original mini takes over your better judgement.