The paint tricks are really more early 60's stuff, but I'm just being picky.
Cobwebbing. Back in the day, using lacquer paint, you just had to not reduce your paint, and shoot it out, with the pattern screwed all the way in, with pretty low pressure. WIth the old siphon guns, it worked with just a bit of fiddling around with fluid volume and air pressure. Recently, I tried to d some webbign on my custom painted pool table, with modern paints. Wouldn't do it al all with a gravity gun. Tried it with an old siphon and had a hard time getting it to go, as well. Finally, I took an old Sharpe gun, the one with the threaded tops, for a coil shaped anti drip tube, and 'T'ed off my air line with another piece of hose, a small regulator, and ran it into the top of the gun cup, to help push the unreduced paint out of the nozzle. This seemed to work OK, but I really didn't get the patterns I remembered doing it the old lacquer method. But maybe that is just my memory fading!
Lace. Easy, just paint your base, let it dry, but keep it in the recoat window, and just stretch some lace across the area to be painted, taping it down tighly, and then lightly dust a second color over it. Clear when finished, with both methods. If you are having trouble keeping the lace down, some guys used to spray either hairspray on it to get it a bit tack, or the spray adhesive you used ot use to get DA paper to stick to the pad, before it came pre-glued.