No, desert varnish is not poisonous but who would ever have a desire to consume it?

No, desert varnish is not poisonous but who would ever have a desire to consume it?

Ice erosion can do this as can aeolian erosion (desert varnish).

The most abundant microbe in the desert is a blue-green bacterium called Microcoleus. One unique type microbe in the desert is the so called "desert varnish," a type of fungus that can turn desert rocks all shades of green, orange, and yellow. Another microbe found in the desert is lichens, a mix of fungus and algal cells.

No, resin is not a varnish .