rattle can under coating?

[LS6 Tommy]

Any preferences on spray bomb under coatings? I want to give do a quicky firewall-back undercoating to the 'Bu this spring before I put the rear axle back in.

Tommy

[TonyL]

I use the "bedliner" from NAPA. Cuz it's black and stronger than regular undercoating. Cheaper too.

[Rick Dorion]

I used 3M paintable undercoating. I don't recommend it as it scratches easily and is not chemical resistant as I have found.