I bought a used black MT for $60, robbed what parts I wanted and flipped it for $125.
I sprayed the bowl and lid with some WD-40, not much cause it goes a long way, then used a razor scraper to get the bulk off. Washed it all down then sprayed some more WD-40 in a some 0000 steel wool and finished cleaning it inside and out plus the ash sweeps with some 2000 grit.
WD-40 won't evaporate it goes forever as a lubricant for cleaning and polishing.
Then washed it all down again and used detail spray and a clay bar on the outside to remove the water spots.
Soaked a used hinged grate in some oven cleaner then wire brushed it, bought a new charcoal grate tho.
Washed everything down again with Dawn Ultra.
Clean up the nuts and hardware with a mini wire brush, a little detail spray to sharpen the plastic, polish the ash catcher and legs she looked close brand new again.
Hopefully the new owner did a burn off before putting food on it[emoji848][emoji2955]