everybody knows that cylinder internal rust is not good ...but does cleaning it improves the situation???
heavy rust will make it imposible for visual inspection and therefor should be cleaned.
external rust should be totaly cleaned and then coated and painted to prevent the on going process of rusting,on the other hand internal cylinder after cleaning doent get any painting!
if rust is not too heavy to prevent visual inspection ability should it be taken off? what is the purpos of scratching it off?
does rusty cylinder becomes safer after cleaning??
does rust bring more rust?
why not just dry ?