Targetmaster, I stayed up until after midnight this morning (Sat) making these kind of targets for a fun shoot for our high school trap team. 50 youngsters, and I promise you, they had a ball!
We have tried the chalk in red, white and blue, and the best results were achieved with the white and blue. The red is not really a red, but more of a reddish brown. I also bought some powered paint (Tempera) in red, yellow and purple. It worked, but not nearly as well as the chalk.
To trap the powder, I cut circles of plain typing paper, and glued those to the top rim of the target. Best results was plain old yellow wood glue applied to a thin border on the outside of the circle. Press on, let it set a few minutes, then use something to apply smoothing around the ring.
We shot 41......we some were shot at, but you get the idea. Hope you have good results. I know our kids loved them!
Mike