In another question I figured out how to get some basic info on my poorly labelled trailer tires.
Now that I know the inflation pressure, load rating, etc., I'd like to write this on the tire in some way, ideally permanently. I don't want to go from memory long after when I need to check the pressure (nor avoid doing it because I'm unsure of the right values).
Is there any way to safety and effectively write (or paint?) on a tire?