Here's how I do it. Put painters tape along the lateral line , two strips really close . Spray the black, remove the tape . And use a toothpick dipped in black to add blotch spots so the line doesn't look so straight .
I had the 4 cavity del mart mold. It was dang near identical but about a 1/4 inch shorter. The do it mold is identical. Here is a pic with a senko in the mold.
Starting to inject plastics and I bought this mold . I am looking to make this color, what should I buy? I'm guessing some kind of dark blue, small green flake and some kind of hi light?
Here it is, it was in the hard bait tutorial, but I don't see why it wouldn't work with plastic!http://www.tackleunderground.com/community/index.php?/topic/11512-slip-molds-for-hard-baits/