I'm already using grille cloth. I ended up taping off the entire area, baffle to paint, and put some expanding foam in there. Then I cut it down and used it as a stencil and then cut out some frames. I could not get the right size. I'd cit something out, too small. Try and mold some plastic, could not get it to stay. It worked, I'll post some pics tomorrow, but I am not liking how the kicks look after paint,