Grant Erwin wrote:

Is there any safe way to open a still-pressurized can of spray paint with a
completely plugged nozzle, to get the paint out so I can brush it on?

I've done this many times. Go outside with a smallish bucket and pierce
the side near the top or bottom with a knife tip. Twist a bit, and push.
A small hole; about 1/16 x 1/16 inch. It'll hiss, pull knife out, it'll
hiss like hell, then tilt so the pressure pushes the paint out into your
bucket.

It's not going to burst like a balloon. But you will get paint on
yourself.

~Dave