At the end of August, I had time and a dry spell to wax the underside of the 90. After 3 1/2 years it was starting to show signs of surface rust on weld seams on axles and the chassis in places. Decided on using Dinitrol and applied coat of 3125 followed by a good coating of 4941. It took a couple of days over a weekend. Most of which was prep work, actual spraying time/clean up was just a couple of hours.
I was dreading doing it after reading all the horror stories. I steered away from the normal waxoyl as I haven’t been impressed by it when I’ve used it in can form. So I bought a kit of Dinitrol that came with a shultz air spray gun, 2x 1L cans of 3125 and 3 1L cans of 4941. The kit cost £89 incl shipping. I also bought 2 disposable paint suits, 4x rolls of masking tape and 4L white spirit.
I spent the evening before cleaning it off, which wasn’t too bad after spending a few hours cleaning the underside on Sunday after off-roading at Slindon. I used some decorators sheet that I already had to cover the drive, hubs, exhaust etc and used masking tape where I didn’t want the spray to go. So the cleaning and masking took about a day in all…
The spraying actually went fine. I found that a pressure of around 4.5 bar worked well. Only problems was that the two cans of 3125 wax only covered chassis and axles and so I didn’t have enough to do the inside of the chassis. So if you want to do inside of the chassis and doors etc, I’d buy an extra two cans of 3125. As expected the 3 cans of 4941 was more than enough.
Then spraying and removal of masking about another day in total. Finish worked out really well, and the 4941 has hardened to a durable finish (well so far so good at 7 months)…
