Different people has different thought on this and I think it's mainly down to how much time and money you want to spend on cleaning/detailing/maintaining, or whatever you call it, your car. Many people simply think it's too much of work so just pay someone to do it.
For me, I collected the car brand new and I specifically told the dealer not to wash or treat the paint work at all before delivery so the car on the day of delivery was very dirty but I start my procedure after taking delivery.
Below is my thought only:
1. equipment you will need:
pressure washer
a lot of high quality microfiber cloth
2. About the roof
Throughly clean and protect which takes place annually or bi-annually depending on how often the roof get wet. My procedure is to vacuum clean the roof when dry. Then wet the roof using pressure washer but set to low pressure (basically, it blows to your hand and you won't feel pain) follow by gentle APC or any fabric roof cleaner to clean the roof with a soft brush. After that, pressure wash (again, low pressure) the roof to get rid all cleaner and dirt. I then use wet vacuum to suck out the water and dry the roof. Depending on how dirty the roof is, repeat above steps if the suck out water is still dirty. After the roof is dry, I then apply two coats of impregnation agent (I used fabsil gold) and let it fully dry. There are some misunderstandings about this. Some says we shouldn't do this as the outer fabric is not for waterproof purpose. I partially agree on this. The outer fabric is not for waterproof purpose but the impregnation agent can stop the fabric itself becoming wet. The wet fabric will encourge the growth of fungus and speed up the degradation of the fabric. After applying the impregnation agent and let it fully dry, the water will either stay on top of the fabric or goes through the fabric to the waterproof layer in the roof and drain away. It will not wet the fabric itself. After treating my roof, the car stayed in heavy rain for three days and after the rain stopped, I simply blow the roof using garden blower for 1 minute to get rid of surface water then the roof fabric is dried. Anyway, just personal thought.
Then, after the annual or bi-annual clean and protect, I just vacume the roof occasionally to get rid of dust or dirt. No need to wash at all unless bird poo is on the roof, in which case, spot treating the affected area using the clean and protect procedure.
3. About the paintwork, again, I divide the work into annual treatment (new car treatment is same to this category) and regular maintenance wash.
For annual treatment, below is what I do:
wheel off and clean and wax or coat the alloy
while the wheels are off, clean wheel arch, brake caliper etc.
Wash procedure:
snow foam -> pressure wash -> contact wash -> pressure wash -> fallout, tar, glue remove -> pressure wash -> contact wash again -> pressure wash -> clay -> microfiber dry
As it's annual treatment, I then single stage machine polish the paint using finishing stage polish. But both my cars are quite new and maintained from new, so single stage is enough. Depending on paintwork status, if it's bad (e.g a lot of swirl) more stages maybe needed. After this, I then wipe the paint with BH cleanser fluid to prep the surface then wax.
For regular maintenance wash (e.g once per week or once every two weeks etc.):
clean wheel&tyre -> snow foam -> pressure wash -> contact wash -> pressure wash ->blow away surface water -> microfiber dry with QD
During winter or when the water beading ability is low, I add a step of spraying Hybrid Ceramic Wax so the procedure looks like below
clean wheel&tyre -> snow foam -> pressure wash -> contact wash -> pressure wash -> spray HCW -> pressure wash -> blow away surface water -> microfiber dry
As you can see, there are so many works to do if you follow my procedure. But I personally quite happy with the outcome. The G29 is still very new so I won't use it as example. My G31 is about 2 years old now and it's been daily driven to all sort of terrain that it can go through. So far, I never let anyone (specifically, dealer) wash the car and always follow above procedures. After 2 years, there is still no swirl at all.
If you think this is too much work to do, then as others have said, let someone do the detailing and apply ceramic coating may make the cleaning much easier. However, I'm not too interested in the ceramic coating. I prefer either to follow my above procedure, or apply full PPF to the car. To me, and this is only my opinion, the ceramic coating is not fully swirl-proof or paint damage proof. Therefore, if you have it applied but not wash the surface carefully, damage can still be introduced. Now, with the damaged but good quality ceramic coated paint, it's almost impossible to machine polish out the damages unless you use extremely aggressive compound and pad, or wet sanding the paint, which is not what I want to do. If you apply the less good quality ceramic coating, which can be machine polished out, it offers much less benefits than the good quality one, which makes me wonder why applying the less good product at the first place?
Anyway, sorry for a long post. All above contents are just my own opinion. :rofl: