I did this with all my engine bits as well. Also works very well on plastic parts, and brings old light clusters up like new.
I've found the secret to keeping a happy marriage with this method of cleaning is to wait until your parents go on a two week holiday, and then take all of your stuff around to their house instead. You can even earn brownie points by saying you want to water the garden!! Worked a treat for me!
Keep smiling
Adrian
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