mig welding

Guys, with all due respect, I've done this kind of thing with cardboard before....... it burns. Plastic doesn't flame like that.

We've completely missed a few hot pieces that hit cardboard and got through the first layer......although it might look like it's "out", we have had a few close calls with smoldering cardboard after the fact.

Plastic sheet will stop the particles that might fly, and only soften and melt where hit......it won't burn, and it won't let anything through to your headliner.

It's also a LOT easier to handle and manipulate than cardboard.