Sometimes if need be I wash the engine bays of cars that I will be working on so as not to get dirt in the engine if I'm going to be taking things off like the valve covers, front cover and intake manifold. But, as far as the use of fender covers I do use them as to not have the dirty air hose for my air tools blemish the paint.
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Ford Diesel and Heavy Line Technician at your service. 
Last edited by Dreadnaught; 12-11-2016 at 06:23 PM.
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