at
LOWE'S--a product like "Goo Gone" (citrus cleaner) called
RIGHT STUFF (
http://www.cli-rightstuff.com/1400.htm). It is on sale for only $1.03/quart sprayer bottle (regular price is $3.96). It took me about 15 or so minutes to clean off the discoloration on my engine.
BEFORE:
AFTER:
[8D] [^]