I have a fan clutch that works fine but doesn't look so good. I have tried cleaning it with solvents and a wire brush which has improved the appearance but it still doesn't look so nice, particularly in between the fins. I have been thinking about sandblasting it. I figure I can tape up the area where the shaft goes in the back of the housing to keep sand from getting in around where the seal is but I'm a little reluctant about blasting the area on the front side where the spring is as I can't see what is behind the spring. Is there any risk of ruining the clutch if I were to do this?