Top of the Morning!
For answers to this question and more,  find yourself a copy of
"Ultimate Auto Detailing--Your Hands-On guide to the Professionals ' &
Concours Winners Secrets" by David Jacobs (or equivilant).
Don't toss out that bottle of Armor All!  It's all in knowing how to use it!
Everything you ever wanted to know about "detailing" is here.
After reading this, I went right out and had Hester's engine steam
cleaned--tho I'll not go so far as these Concours Winners--
(who surely must all be Virgos).
Being mechanically challenged, I've always invested in elbow grease, and the
belief that a clean car runs better!
Happy waxing,
Phaedra
"85 Westy-Wolf
"Hester"