Rooster, what Cadman was talking about when he said "heating through" was the entire weight being heated so that the paint would melt on the entire weight because even though it is metal and it conducts heat you can still get an area that the paint will melt while just sticking without melting on another part of the jig. So in order to have 2 colors come together seamlessly the weight or jig needs to be heated through, just make sure you don't melt it. To do that you just hold your weight over the flame and count to 4 and try it, if it dosen't gloss over a few seconds after dipping try 6 seconds and so on and then remember how long you did it for the size weight you painted. I'll save you some time, don't use a hair dryer, no where near enough heat, you'll be on it for 6 hours before it even gets close enough for the paint to stick. You can heat in the toaster over and then pull the weight or jig out and then just dip, doing the toaster oven method is good for single colors, the reason I wouldn't use it for multiple colors is because of something you already found out, the small hunk of lead will cool very fast so having a jig right at 350 by the time you dip it has already dropped a few degrees and the paint will drop it even further so a second dip or even a few taps of ppwder from a brush isn't going to go on as the weight will be too cool. With a heat gun or torch you can heat then dip and then quickly give it another shot of heat and get the second color, and if you use the torch remember to keep the weight just above the flame, you don't want it to hit the weight, especially if you have paint on it since it will scorch any paint you have on it. Curing is simple, you'll see some guys really get into specific temps and times for different colors but I found that 350 for 15 is great and if you aren't confident try 20 as the few extra minutes won't hurt it, once you take it out and let it cool you can test the cure by dropping the weight on a side walk or other concrete surface to see if it chips, if it isn't cured properly you'll know it right away as it will chip instantly on the surface that hit the ground but I think no matter the brand or color 350 for 15 to 20 minutes should be good for a solid cure.