#1, no way would I be trying to spray paint installed trim!
Your going to spend far more time masking off, thinning the paint, cleaning up the over spray and the gun then just using a foam roller and a 2-1/2" brush.
Your going to spend far more time masking off, thinning the paint, cleaning up the over spray and the gun then just using a foam roller and a 2-1/2" brush.