Stuff I'm familair with is polyester resin which is cured by crosslinking
with styrene. You mix resin/styrene mix with catalyst and have about 15
minutes to smooth it over the dent before it sets up. When cured, you sand
down to smooth out dent and paint. Obviously not as tough as steel, it is
just a cosmetic repair.
Pretty damn tough, actually. Hit a properly cured chunk hard with a big
hammer and see what happens. I've seen 5 pound hammers bounce away
violently with only minor scrapes resulting on the putty surface.
"Blue Moon" brand body filler is another good one. Main desirable
properties of body filler include:
1) high viscosity
2) stickyness (bond-ability)
3) cured toughness (not just hardness)
4) curing time allowance for working with it (yes, 15 minutes is about
right for what I've seen)
Mark 'Sporky' Stapleton
Watermark Design, LLC
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.