Opinions on painting or semi textured undercoating for undercoating the body. Im not talking about a hack job. But throughly cleaned and done right. Pros and cons?
I plan on soundproofing to the max. So the inside of panels and floors will have a sound deadening mat and spray inside of panels applied. I want the inside quiet.
How should the underbody be done. This will not be a show car, but neither a daily driver. A full resto job done right and only driven on good days and occasionally entered into small shows.
Thanks for your opinions.
72 Nova SS all number matching car.

Sarge

fluid film or wool wax

preserver it coating not a paint

I'd spray 2 -3 coats of black epoxy on the underside...or roll or brush it on..

Would Not use any rubberized under coating at all ...just the epoxy.

You want to be able to see if some rust is starting down the road...

That undah coating just hides the sins.

Fluid film seeps in-between panels....wool wax is a heavier application

For coating frames and floor pans

I use seam sealer anywhere i repaired metal then black tractor paint from tsc. Then wool wax or similar over that when done.

Nessmuck, does brushing on the epoxy result in great results or does it look cheap and tacky?
Is eastwood or sems the best.
Not able to spray paint large areas like the bottom.
Not a fan of POR15.

Sarge

I brushed on my paint so it was thicker than spraying. And u can see the brush strokes, but its gloss black. Probsbly should have used semi or flat. And I'm not a body guy, maybe it was too thick, maybe I had too much to drink? Or both.

About ten years ago, I had a guy contact me about buying beeswax. He needed eight pounds. He said he uses it to undercoat vehicles. I’ve kept bees since 1974, I’ve never heard of using beeswax to rustproof a vehicle. I had ten pounds of dark wax in the garage, gave him a good deal on it .

I could see where it might work well, but keeping the wax fluid and going through a spray gun might be a problem.

If someone lays on the ground and looks under your car and says

A negative comment...just kick him in the nuts while he's down there.

Then asked him how it looks through all the pain and tears?

Sarge

What if he identifies as a women. Do I still kick'em in the nuts?

Sarge

Twice, just to double check.

I think kbs makes the best underbody paint on the market. I think smooth paint is better than textured coatings because it cleans off better. Fluid film annually is cheap insurance too.

Ive never used it but what about por-415 it seems to have good reviews?

I use fluid film from a wool wax gun and yes it does get into every crack I fog in every body plug I can remove I did a minivan for the neighbor I though I was doing a 2016 it looked so good in 2023
as I started taking plugs out and door strikers off and could tell it had definitely been fluid filmed before that was why it looked so good , it was a 2006 when I checked the drivers door.

a friend uses wool wax and I noticed how much stickier his is

I fog all up in the frame rails and every where I can in mid September.

Wisconsin 2013 f150 that has been fluid filmed in September what it looks like May 15


I know of a guy with a 2014 dodge that my wife worked with that the entire frame rotted out on by Nov 2024 he took it in for an oil change and they said it bowed on the lift so they just put it back down and said no oil change.