I recently bumped a man who stopped his old suburban in the road, no damage to him, my front bumper at the top got dented in two places, by denting I mean the plastics stretched and had a nice thumb sides 1/2"+ deep dent in the plastic, as well as a great gash in the plastics, about an 1/8" deep.
I planned to fill the thumb hole With plastic weld and then fill the rest with marine tex.
I scratched that plan and decided use the welding gun to heat the plastic, inside and out, and then use a GLOVED hand and block of wood to reshape it. It worked better than imagined, acted like silly putty until it cooled and hardened.
With the gash I heated it and spread the plastic around and it filled the hole.
To detail it I used 'Marine Tex' like bondo.
Use a medium heat, constant sweeping
Motion never stop the heat in one spot. It was surprisingly easy, only issue is I sanded the 'bondo' alil to far so I exposed raw plastic around the area I fixed, black plastic on white paint is ugly and stands out well.
I hope this helps, it's super easy to do, and in my
Opinion if you fail then turn back to the original ideas, jb weld ect.
I don't plastic weld much, I bought a cheap harbor freights plastic welder with built in air source(alil bulky) and it works amazing. I'm seriously concidering building an up great to my IC pancake pipe and plastic weld it all together.
