All great ideas. I would use a bed liner material to coat it. Something like raptor liner in either Black or tinted to match your rig. But that is just my opinion.
In my area it would be really rusty extremely quickly like a few weeks..
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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