bondo and fiberglass work wonders for body kits.....i got a razzi body kit off a friends 2003 cavalier and used the side skirts on my 98 neon(after some trimming)....and molded the back bumper skirt to my stock bumper...looked pretty good but it took about 5 cans of fiberglass gel, 1 gallon of bondo and 1 gallon of fiberglass ressin

 

its a kinda costly process

 

for sure....i spent alot of money on the fiberglass and alot of hours making mine the way i wanted it.....but i recently just threw it all in the garbage....so oh well