I was going to get some house cauk(sp) that can be painted over, put some of it on an uncracked portion of the dash, or perhaps some latex to make a "mold" of the texture that the dash has. then squeeze the caulk into the cracks, filling them upto the top of the "ravine" then using my dried, textured, mold I would give the caulk the original texture, then becuase the color wouldn't match, I would paint the entire dash black to match it all..... I'll let you know how it turns out.