Member, P500 Sport, DSC off (>900)
Join Date: Oct 2009
Location: New Zealand
Thanked 179 Times in 139 Posts
I recently decided to do some detail cleaning under the wheel arches in preparation for an upcoming car show, where the car would be judged in a BMW Car Club team of two.
Starting with the left front corner, upon removing the plastic liners I came across some surface rust that had developed, due to poor sealant around the aperture for the brake/fuel lines and wiring in the inner wing.
Water had penetrated and soaked beneath the loose sealant, with the result that the metal surface had started to corrode.
It's also possible that a knife or other sharp tool had been used at the factory for trimming sealant or masking tape in this area, exposing the bare metal to the elements.
I had to remove quite a large area of sealant to locate the extent of the corrosion, which I then treated with phosphoric acid and rust converter before applying POR-15 silver rust preventative paint. Finally a coat of Dinol corrosion inhibiting compound was applied.
I was a little anxious about finding a similar problem on the right front side, but was relieved to find the inner wing structure is different on that side and all sealant had been properly applied there, with no induced corrosion.
Each of the four wheel well areas, including cleaning the shock strut, brake and suspension elements and the inside of each wheel, took a little over four hours to complete!
Other areas under the car also needed detailing, then the body paintwork was treated to some 'Meguiar's' compound and finished off with Carnauba wax.
The interior and engine bay required very little preparation.
My car was teamed up with an Alpina B12 5.7 for judging in the Car Club team category at yesterday's show.
We didn't win, but came away with a minor prize which included some more of Mr Meguiar's fine product, and I've learned a lot about this level of displaying cars.
Not sure if I'll to do it again, but I enjoyed the experience all the same....and the car has never been cleaner!
1987 E28 M5 (DC98) Delphin-metallic/Midsilver Nappa
1986 E23 745i/M88 (6928) Arctic-metallic/Oyster Nappa