Guys - I am installing secondskin damplifier PRO. Have the outer door skins done from the inside. As for the inner door skins ...do you stick it on the outside of the inner skin which would be directly under the door panel? Will the door panels still fit ok? Or, do you work form the inside of the door and stick it on the inside of the inner skin?

thanks JD

I installed dynamat extreme on the outside of the inner door on my second gen. Door panels fit fine. Plan to do the same on my 69. Don't know if that helps, secondskin looks like a much thicker product.

I'll have to check the specs on both to see how much thicker....so it does help....thanks!