Hi
Yes always try to do exterior first, as when youve done interior, and then powerwash the doorjamms, things might go flying back in.
Anyway heres a full progarm we use.
1.Hand wash clean wheels and wheel holes and dry car
2.Pollish with flex machine, cutting pads and using mild medium or coarse compound depending on vehicle state.
if coarse is used, vehicle is then cleaned and redone again w medium.
3.pollish whole car again, now with doubble headed orbital, and medium to light swirlmark remover, get rid of any swirlmarks, first step left behind
4.wah car again, using also degreasers to help get any residue from cracks nooks and corners completely away.. ( I hate white compound residue on a detailed car) in this step we now also clean engine, and door jambs, and wheels again if needed. car is the again dried and checked for any faults.
5.Interior detailing, Steps may vary depending on vehicle, but general idea is, vacum good first, then start detailing from top to bottom, as in starting w roof, and going d-wards,
Lets assume its a dirty car , and that all seats also have to be done, this can make the time vary a lot. dirty leather can take a long time, and so can dirty fabric seats, to get them really good again. If its a smokers car and the roof is bad, calculate at least 1 hour on just the roof.
A good extractor helps a lot in getting the fabric seats back to life, and in cleaning out soil from fixed carpets, allthough it is the hand scrubbing before that takes most of the time.
6. Now the luggage compartment gets done, all the way down under spare tire, which is also taken out and cleaned
7. engine bay is now after dried, checked and dressed, also the tires and above are dressed and wheels checked for lingering dirt. which may have been missed.
8. Now we add by machine either a paint sealant or a wax to the exterior, and door jambs get a hand glace wax as well as chrome details, and handles. leather seats and details also get a leather guard protection applied.
And the fabric receives a fabric protectant.
10. windows are now polished and a final vacuum of car is done again, and the last check of all exerior and interior to make sure nothing is forgotten or missed.
This whole process can take anything from 6-12 hours, depending on the vehicle.
But i would say the average is 8-9hours.
heres a link to some of the cars we have done.
http://rsrtuning.com/mrcaptrabajos.html