Sport mirrors how do you pull them apart for painting?

Might seem like a stupid question, but before I go trying to pull my sport mirrors apart and damaging anything (remember I'm in the south pacific here = expensive and hard to get) are there any tricks to disassembly for repainting? Looks as if the mirrors were assembled and then painted by the factory and the lenses stuck in after? If so how do I pop lenses out? I've got a loose passenger mirror too, so have to figure out how to tighten that too. Not to mention missing the ring nut and clip to hold the adjuster to the door....