So I tried the CLR cleaning method today I read about several times and I am pretty content with the results.

I only did the left side of the truck to really be able to see the difference.

Note: that I don't have power or water at my shed so the light isn't great and I didn't have a chance to thou roughly rinse the truck off before and after.

Here are some pics:

https://photos.app.goo.gl/f2tNF372jjad9uPE9
https://photos.app.goo.gl/51j1CjnqDCgRSDgB8
https://photos.app.goo.gl/hyuBhevAHmVqGCo8A
https://photos.app.goo.gl/J6FHDNGAFRkq67hk9
https://photos.app.goo.gl/Xr9wjFzzuB9VX9Yg9
https://photos.app.goo.gl/cYjzoJzamYUarYMu7