What do you make of this substance on unit

Specific Inspection Topics Inspecting HVAC Systems
21

Again Jeffery feels he can demand what others choose to do .

You sure are a strange person .

http://www.nachi.org/forum/f5/intern…html#post90964 .

22

Why don’t you guys take this crap out of the tech threads and put it where it belongs there is no need for it here