There are probably many ways to create a good appearance when you're doing a crack repair, but the question is how will it hold up to the expansion and contraction which is part of living in the real world of temperature changes.

That's why I'm interested in any substance which is not simply rigid, but which has flexibility and can accommodate these temperature changes.

I'd also like to find the link to the remolded dashes for the W126, although I only have one small crack near the speaker grill.