Spray painting a frame: place the frame in a box, and spray one side of it with your choice of spray paint. Leave it in the sun to dry, and then flip it over and spray the other side. When both sides of the frame are dry, take the frame indoors.
Paint Paris Gray over gold frames and let them dry really Well. Sand them with a wet rag and then Use a coat of clear wax and then a coat of dark wax. Take an old t shirt and dab some clear wax on it, rub over the dark wax, taking off all the excess.
One of my favorite techniques when spray painting a frame is to spray some of the deep grooves black first, and then go over it with silver spray paint. It gives it a nice, dimensional look. From 10 Spray Paint Tips: what you never knew about spray paint