I only advise on LC200/LX570, but you can do the math for yourself using the following excellent monograph on the subject published by Toyo Tires:
Guidelines for the Application of Load and Inflation Tables
Lots of good general tire info, too.
HTH
My belief is yes:
Since UHMWPE does not contain chemical groups (such as esters, amides, or hydroxylic groups) that are susceptible to attack from aggressive agents, it is very resistant to water, moisture, most chemicals, UV radiation, and micro-organisms.
My only concern is that metal...
My recommendation would still be the same - anything above 25psi so the tire doesn't overheat on the highway, and whatever pressure above that to make you happy with your particular use case. Trying to find an "ideal" or "correct" tire pressure for everyday use with these tires would be an...
Your use case is so far outside the normal operating conditions for the LX570, that I am not confident in giving a RCTIP.
My best personal recommendation is to try various tire pressures between 25psi and 35psi until you find one that works best for your particular use case. As far as safety...
The RCTIP (Recommended Cold Tire Pressure) for those LT285/65R18 Load Range E tires on your LC200 is 42psi Front/Rear.
Here's a link to an excellent monograph on tires and pressures published by Toyo Tires: Guidelines for the Application of Load and Inflation Tables
That should answer your...
That looks a lot better than rev 1, but why two cutouts for a valve stem when there is only the possibility of one on the RW wheels? There will never be two valve stems. Having two just looks...odd.