Hey folks I have a chance to pick up an old 1970 glen field model 60 for a 100 bucks. The guy said I could test fire it before I buy it. He also disclosed that the gun shoots well with quaility ammo but jams up on value pack ammo. I have looked the gun over and it's in good shape but is extremely dirty and I suspect that's the cause of the jamming with cheap ammo. Any way my question is do you think it's safe to spray a little brake cleaner in the action before I fire it to clean out some of the grime before testing it. Thanks.