as for how to's its alot of trial and errors.
I will give some hints...
Plastic parts: get a 1 liter pepsi bottle with the wide throat so ya can put stuff in it.. Add enough coffee grounds to make about 8 pots of coffee, add hot water, shake periodically and let it sit for about 6hrs shaking here and there.. When thats done then you use my special mixture see below
Hardware: Nickel parts like screws etc just soak in bleach for about 30 mins. Chrome hardware you have to make a saltwater brine and let them sit in it for a couple days
Body: use fire, keys, anything its up to you.. I would have done the pickguard wearing a bit different but whats done is done. First thing I did is take the body completely apart and then I chucked it down the drive way for some bumps and scratches. I also used my key chain and whacked it a few times in certain spots.. Other things used on the body: Screw drivers, wrench, pliers, etc... Also to take down the gloss on the body in worn spots I used 0000 gauge steel wool.. Make sure you get 0000 gauge it wont leave scratches otherwise it will just look scratched to hell.
Neck is a huge combination of sanding down the back of the neck and applying various stains from ebonys, ambers, naturals etc.
*special mixture: I use golden oak stain combined with dust from my vacuum cleaner bag.. This was used in several areas and spots. From the knobs and single coil covers, to underneath the saddles on the bridge. I also use this mixture for the pickguard by putting it on, rubbing it off, putting more on rubbing it off, until I got the look I desired. Dont put a ton of dust in it unless you want a ton of dust LOL..
I used alot more stuff but thats some basic elements.. Alot is trial and error. You really got to just try different things and see what works..