I was given a low level Dovo from a friend. It is in good shape but it is just starting to get some rust on the blade. What is the best way to get rid of the rust with taking on a major multigrit sanding job? Also, the blade does not fit correctly in the scales--If I am not careful when closing the razor the blade will hit the scales. Is there a way to correct the problem without re-scaling the razor? Sorry if the questions are a bit elementary (I am a bit of a newbie). Thanks- Charlie