I just did my 2009 tocuma rims. As they were oxidizing up. I wet sanded 220 uses seim primer then just after wet sanding again 400 I used a dupicolor titanium grey on them. They have some imperfections as I didn't spend weeks sanding things to be perfectly smooth.
I think your color choices will be fine. I just wanted these rims to look similar to what they did and they match their hubcaps.
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7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread:
https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer:
https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information:
https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html