Undercoat fresher?

[plasticman-32]

Hey guys
Questions my 68 has original undercoating and I prefer to keep it so it will be less work and cost less the undercoat is in very good shape, I know most remove and use a lizard skin or rubberized coating or remove and paint

But is there an alternative just to clean the undercoat and spray a black over it to make it look fresh is there a product that will stick to the original undercoat

Thanks guys

[b5blue]

Same here I used and like "Rust Encapsulator Undercoat" from Eastwood. 

[Alaskan_TA]

Slow evaporating laquer thinner sprayed in a light mist from a paint gun will get some of the dirt off & make it look fresh for a while.

[maxwellwedge]

I spray it with varsol and steam clean. No steam cleaner available?....bristle brush and a ton of hard labor!

[qwick68]

I used POR 15 and painted my original under coating with a foam brush, worked great, a few touch up areas with regular spray undercoat and blended it in, great results.

[plasticman-32]

I used POR 15 and painted my original under coating with a foam brush, worked great, a few touch up areas with regular spray undercoat and blended it in, great results.

Good idea I think I'll try that