This is one of the finished cars. I made quite a few, in different color combinations, but the concept is the same. As it was, since he didn't tell me until the morning of, I was a bit crunched for time to get them completed in time to bring them to his class. I ended up mixing in some Roses Pretzel Rods for the girls which are a ton faster, since they need less detail and color changes.
So, first thing. This mold is a Wilton mold available at most regular craft stores like JoAnn's, Micheal's or from Wilton itself. The mold has 2 car designs and 6 cavities total. When you buy the mold, it's front has ideas of how to color it, including some of just solid chocolate (which are just as yummy). I like to use the Wilton's Candy Melts.
To start, I put some black candy into a disposable decorator bag and melted it in the microwave. I usually do 30-45 second intervals at 50% power. After each interval, I take it out of the microwave and squish it around and check to see that it is all the way melted. Once it is melted, I move onto coloring.
So, back to the "painting". When you look at these, they talk about "painting in the details" and there are even paint brushes that they want to sell you for this purpose. I have yet to make a paint brush really work. The candy dries on it's bristles almost immediately. It is SO much easier to keep it in the disposable bag, snip a small hole at the tip and then paint in the color with it - like you would pipe a name on a cake. The smaller the detail you need, the smaller hole you snip in the tip. For the tires, you can just pipe in a round blob in the tire well, but for the steering wheel, you need to have a little more precision. After you are done with your black, set it aside to use on the next set. If it hardened by the time you need it, just remelt.
After you have the black finished in each cavity, place the tray in your frig, while you get your blue ready in anew bag. Use the same process for melting. By the time it is melted, the black should have hardened up. Pipe the blue in the windows.
I end with the rose ones: