Sound deadener in doors

[pmpski_1]

I have my door panels off and was thinking about doing some dynamat or similar before putting them back on.

Couple of questions.

1. The surface isn't entirely smooth. Will the sound deadener still stick?

2. Does it matter how much I put on? I realize that the more you cover the better it will work, but if I cover up a big section in the middle, do I get that much more sound deadening by going all the way to the edges?

Thanks!