The Civic's exterior body metal was carefully taped with 3M 233+ masking tape, and the fender flare was reinstalled in preparation for bodywork. | 
The gap between the fiberglass fender and the polyurethane rear skirt was filled with Duraglass. | 
The Duraglass was blocked down with sandpaper to the desired shape. |
The driver-side fiberglass fender flare was bolted to the car with 8/32 stainless bolts. Notice the even placement of the bolts, which ensures a tight bond between the two objects. | 
The factory primer and paint was sanded to bare metal in preparation for fiberglass. | 
Duraglass body filler was used to fill the gap where the front fiberglass fender meets the black polyurethane side skirt. |
Rage Gold body filler was applied and hand-sanded to smooth the transition between the pieces. | 
At this point, the car was removed from the garage so that it could be test-driven with all of the body kit components installed to ensure that the car's drivability was not compromised. | 
The driver-side fender was prepped and ready for fiberglass. The Visquine plastic sheeting protects the wheels and undercarriage from any fiberglass resin drips. This was also applied to the floor. |
This picture shows the proper setup for fiberglassing, with the fiberglass resin, cut strips of mat, MEK hardener and a paintbrush. It is a good idea to do a proper setup before your hands are covered in fiberglass, so that you don't have to go and get something when you've already started your process. | 
Four layers of 1.5-ounce fiberglass mat was saturated with resin and applied to the fender. This created a permanent bond between the two pieces. | 
The fiberglass was allowed to dry, sanded down and then entirely covered with a skim coat of Rage Gold body filler. |