Resin is pretty easy. It's like glue. Trust me stick with resin. That other stuff will have you sanding forever if you are not good at it.
First do your cutout and frame up the bezel. (First Pic)
Plastic weld the pieces together where there is contact with the bezel and the new radio and ac controller locations. (First Pic)
Use a smooth -not quilted designed-paper towel on the backside of the bezel to cover the holes you want to fill. Put the resin on the backside of the bezel. (Think Paper Mache. In Pic 2, he/she did it in front. I did mine in the back. Less sanding and smoother.)
Use a small brush and wet around the edges of the backside of the bezel with the resin. You want to glue the paper towel to cover the holes. Let dry. (In pic 2, the person covered the whole bezel. I would just cover the holes you want filled.) Let dry.
When the resin dries, The paper towel "mache" will be hard. (Pic 2)
Slowly begin to fill the unfilled areas until you have a smooth surface. Use layer after layer of resin and mesh. When you get near the desired surface, use resin only. Let dry between layers.
Once you have a good enough surface and the bezel is filled, start sanding. The better you did with the resin, the less you will have to sand. I would recommend by hand.
80 Grit ,120 Grit and 200 Grit will probably be the ones you need.
Paint and Voila.
Last edited by DCSkeptic; 08-26-2014 at 04:28 PM.