What do you use to CLEAN audio equipment CASES?

Simple Green.
It removes oils and leaves a smooth clean finish, especially good on black components. You can get it in a one gallon concentrate or already watered down in a spray bottle at Home Depot.
The stuff cleans just about everything else in your house as well.

simple green is a good cleaner & marker's work ok to cover up the very small nick's but for the bad one's i just repaint the case,it's easy & will make the gear look like new.

if the scratches are real deep lightly sand first & wipe the case down with a damp rag,preheat your oven(yes oven)to 200 degrees & put the case in the hot oven for 10 minutes,remove the hot case & spray on as many coat's as will dry before your eye's changing direction with each coat,i get about 4 coat's on while it's still hot,let the case sit for about 2 hour's then your ready to put it back together

rustoluem makes a fantastic paint for doing this,it's called 'hammered finish' & it comes in a few different shades ranging from dark grey to coal black,the hammered finish will make it look like a pro painted it & by having the case hot when you paint it you wont get any run's or drip's plus the finish is baked on & hard as a rock & will not scratch easy or wear off with regular household cleaners.

try to figure out how to hang the case beforehand & have everything ready before you heat the case,i use a coat hanger & have it hung in advance in the garage then i put the hanger thru a screw hole,i also have a few extra can's of paint on hand incase the tip plug's on the one im spraying with.

Bigjoe
That was a great tip,thanks.I wonder if it works on aluminum as well?
George

Endust for Electronics: cleaner + antistatic spray in a can. Apply with blue lint-free paper towel cut into smaller pieces. Applied to faceplates and covers it yields sparkling-clean fingerprint-free surfaces. Applied to the label-side of CD's it actually improves the sound in some cases. Applied to transport drawers or to cable jackets can result in improved sound in some cases, similar to Nordost ECO-3 antistatic but significantly less expensive. It also cleans CRT surfaces, leaving an antistat coating which repels the attacted dust. Endust is commonly available in retail housewares sections.

My less complicated method is 'glass plus' --- Lightly spray a clean white cotton cloth, not the component. Then turn the cloth to dry--- Gets rid of finger prints and light grease.