I would love to add something useful to this.....and I'm just going to stick to exterior.
Starting with wash.
Evaluate debris on paint surface to come up with wash process. If the surface isnt that dirty I ONR the car. If its dirty I'll go with a foam cannon while foam is on the car start my 2 bucket wash. Before I start washing I do the wheel wells, then the tires, then the insides of the wheels, then around lug nuts, then the face of the rims. Then start my washing, starting with the top down, then dry. Then evaluate the paints surface to come up with a process to bring it to the results you want. Here's my services, an aio wax, if im going to polish either 1 step and beyond I'll clay then begin the steps, always starting with the least aggressive method doing a test spot. My old method when I was going be doing any polishing/compounding was to tape off the trim, high spots, cover the glass, any spots that you can damage pretty much. But now with the Meg's mf da system I'm not taping jack and getting amazing results, although if I had a special interest vehicle I'd still tape off everything because accidents do happen even if your a pro. Before you start polishing if your gonna polish the rims do that first and add your protectant to the tires/wells before you start your LSP, incase you have any wind that brings your dressings onto the paints surface.
Onto polishing using products that have no fillers, and this can vary depending on detailer, some will polish then remove the product even if it contains no fillers to inspect their work, some will just continue the process.
1 step
Clay, mild abrasive polish that leaves no visible marring under varying lights, protect
2 step
Clay, moderate abrasive polish or compound, followed up with a lesser abrasive polish to get rid of marring from previous step leaving no visible marring under varying lights, protect
3 step
Clay, Compound, lesser abrasive polish to get rid of marring from previous step, then a finishing polish to get rid of marring from the previous steps leaving no visible marring under varying lights, protect
Stand back and marvel in your work! :buffing: