I found this booklet to be a fairly compact, yet useful rundown on scraping-it might be of some use to those here who wish to rebuild/rejuvenate their machines.Do note that this is a vastly more complicated art and skill than it seems! Suggest you dig up and read Connelly's Machine Tool Reconditioning, Moore's Foundations of Mechanical Accuracy, and also as many posts by Richard King on the Practical Machinist forum as you can find before attempting any serious job...Here goes-will be in three parts: