I saw a video where they used special staples that are heated by a gun and melted into the plastic to join the cracked halves together. Then they used stainless metal strips from old wiper blades to reinforce the crack-prone areas and squirted a bunch of epoxy on them to prevent future cracking. The cracks on the surface were barely noticeable. I'm sure I could get away with doing this. But, I don't wanna take it all apart, fix the cracks, then be bothered by seeing the hairline cracks that were repaired. Or worse, new cracks form elsewhere. I could go ******* on reinforcing the underside so it won't crack anywhere and maybe add a thin layer of epoxy to the topside of the cracked areas. I wouldn't have to worry about the appearance since I'm wrapping it in vinyl. It'd be a one-and-done deal.
A lot of work? Maybe. But better than removing the dash more than once and I'd never have to worry about it again. Plus the backed vinyl will have a softer, flexible feel to it rather than the hard molded plastic shell that's there now.