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I will like to know what is good to clean the engine . I am in restoration process of a 86 spider. I have the engine and trans out, I will like to started polishing the outside of the engine which is very dirty but I don't know what kind of chemical to used. I am afraid of used something to strong that will damage the aluminum. Please advised Thank you
 

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citrus degreasers work well, and are less toxic than traditional solvents ( some still have petroleum distilates ), but they can leave a slight citrus residue.

Simple Green works well, but can dull the shiny surfaces of the aluminum if left on too long.

Gunk engine degreaser works really well, but is not exactly friendly to your skin, or the environment when you hose it off.
 
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