Another very useful "chemical" is sold by Wurth. HS 2000.
This stuff is great. It is a colorless spray lubricant, that penetrates, and once the carrier has evaporated, leaves a tenacious, viscous lubricant behind. You can't beat this stuff(aka, the best) for hinges,pivots etc. GM has a version/private label equivelant of this stuff.
Go buy a can today..you'll love this sh*t!
http://www.paragon-products.com/product_p/wurth_hs2000.htm
One more thing, 3M strip caulk (don't substitute cheap crap). Go buy a box, you can mount speakers,stop vibrations,stick on trim,another thing you should not be without.
A blob sits on the top corner of my tool box. I use it every day. Holds bolts/nuts in sockets very nicely,and much more.
http://autobodystore.net/Merchant2/merchant.mvc?Screen=PROD&Product_Code=3M8578&Category_Code=JASS
3M Strip-Calk 08578 Black 20 yards (60 Feet) 1 foot lengths This black, non-hardening, paintable caulk is just the solution for sealing irregular areas in firewalls around heater and air conditioner boxes, lines and wiring harness connectors. Also great for rocker panels, trunks, around tail lights, trim and emblem holes or just about anywhere gaps need to be plugged. Effectively seals out water, dust, and dirt. Duplicates the caulking material used by many auto manufacturers. Made in USA