For crinkle paint I usually use a solution of a little dish soap and baking soda in water, applied with a soft toothbrush and terry cloth. I have found the paint will sometimes turn colour when wet (at first made me think I had damaged the paint!) but returned to original when thoroughly dry. Others in the forum may suggest something better to use; I'd be cautious about using alcohol.

I am an ex typewriter repairman with about 35 years expierence. Do NOT use ANY alcohol when cleaning a typewriter. Rubbing Alcohol has Lanolin in it. It will eventually gum up your machine. Drug store alcohol has WATER in it. It doesn't matter what percentage it says on the bottle, it still has water in it. Why would you put water into something that can rust? The alcohol may evaporate but it leaves the water behind. The Hardware store brands have acetones and keytones in them. These can remove paint and melt plastic. You should clean your typewriter with Mineral Spirits or Naphtha. Mineral Spirits are also called White Mineral Spirits, Varsol, Stoddards Formula and Inhibisol. You can get naphtha by using Zippo Lighter fluid or PB Blaster. Alcohol in any form does not do the job. It only loosens the grime and only removes some of it. If it actually worked, All the typewriter shops I've ever worked in would have been using it instead of naphtha or varsol. It would have been much cheaper. You can use a little hardware alcohol to clean your platen.