I think roughing up the surface and applying acraglas would work find and dandy. Kind of shape what you want before it dries(you can only get that kind of rough) but try not to leave any extra you can avoid, then file and sand to shape. You can stipple it with a wood burner or I've used truck bed liner, or of course leave it smooth which sometimes works well in that area.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."