Many users say they will never buy a zinc alloy (zamack) razor because it won't last until the second or first coming of their favorite deity although I've already shown that non zamack razors have their own shortcomings. Posting space didn't allow me to completely finish my previous post on zamack and non-zamack razors. The main 2 weaknesses with zinc alloy are with the screws. First they are i think soldered on and can break off easier. And of course the second one is corrosion. With this I can easily help you. Some people say they will coat the threads with oil or cocoa butter etc. Well what i have always done is pick a color of auto touch up paint. I have rustoleum universal grey that I picked because not only did I use it to cover the screws AND just above the screws but also touch up some scraped areas on my skim with the pen portion not brush portion of the paint container. Not bad for 5 bucks. You can also buy metallic silver matching your razor head very well. Just bring your razor into an auto parts store and they will match it for you. When you apply the paint to the screw and above the screw to the underside of the make sure to allow it to dry overnight. Most touch up paint comes as a primer an paint nowadays.