The Rage Gold body filler was sanded down with 36-grit sandpaper on the car. Be careful not to scratch any of the surrounding areas with the rough paper. | 
Eighth-inch aluminum was used to create a new flap door on the gas tank. A Mobile Solutions speaker ring jig was used to create a perfect circle in the aluminum (order from www.mobilesolutions-usa.com). | 
Three-quarter-inch MDF blocks were stacked and taped to the aluminum before being flush-routed to the desired shape. These MDF spacers keep your hand far away from the cutting blade. |
A piece of 1/4" ABS plastic was cut to space the gas door to the desired height. | 
The routed aluminum gas door was taped with 3M tape in preparation for molding it into the car. | 
A sizable amount of Duraglass is used to mold the gas door into the rear fender flare. |
Once applied, the Duraglass was allowed to completely dry overnight. | 
The Duraglass was sanded down with the gas door in place on the car to ensure that it retained its shape during the sanding process. | 
Rage Gold body filler was applied over the entire area to smooth and fill the sanding scratches. |
The Rage Gold was sanded down with 36-grit sandpaper. All of these steps were done on the car. | 
The gas flap door was test-fit and a finger notch was ground into the fiberglass to allow access to open the gas door, just like the factory gas door. | |