The DTM is a great motor Rog. A very "Limited Edition"
2.0L-TFSI, 4x4, bags of space, and a nice place to sit. What's not to love?
Great detailing practice you have too.
Have you considered investing in a blower? We use blowers on most high end cars, and for obvious reasons, most dark coloured cars.
Awesome for drying the whole car (if you can do it in time)
but also for drying window/door seals, grills, badges, door/boot shuts, wheels, calipers and discs etc etc.
We use Gtechniq and Swissvax for our final coatings etc but for the wash stages, we use Autobrite Direct products.
They really do work well and are a great price!
We use....
Very Cherry Non Acid Wheel cleaner
MagiFoam Sno-foam
Purple Velvet Shampoo
Citrus Wash Cleaner/Degreaser APC
Purple Rain Decon-Fallout cleaner
Just the Tonic Tar + Glue remover
Definitely worth a try