I am looking to restore an old L-Tec 250 and am looking for advice on a couple of things. I read your work up on saving face and am going to do that this weekend.I am looking to go inside and clean out the build up on the electricals and drive unit. What cleaner do you use? Is compressed air safe? I know at work they used compressed air on some machines and on some they do not. any advice on restorations will be great appreciated.