Definitely a no-no. Aside from the stickyness, water based black tends to not look as black and a bit more washed out. In stenciling/repainting a pinball cabinet, I used black latex as the black stencil layer. Even though I sprayed it thinned through a gun, etc.. it just didn't look great, so I stripped it all down and completely redid the stencil job. That's how much i didn't like it.