Removing Red Diesel stain from plastic CAV bowl

An age ago I worked as a shot blaster, blasting small valve fittings in a cabinet. The perspex cabinet window would eventually dull over and it was recovered by the polishers using their buffing wheels. If you can be bothered, small buffing wheels used on a typical electric drill and the associated polishing soap would reinstate the plastic clarity, assuming the mop will fit in the bowl.

Something like the these: https://www.amazon.co.uk/Zaeel-Poli...ds=drill+polishing+mop&qid=1573118354&sr=8-10

Also try an ultrasonic cleaner, they are quite remarkable at getting engrained dirt off
 
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