Brushed/Rolled Undercarriage Paint Recommendation

[AffableCurmudgeon]

What do you recommend for black undercarriage paint that can be brushed on or rolled on? It is for a 67 Beetle that is only driven on dry summer days. There is no rust underneath. Undercarriage was painted about 12 years ago (not by me). I just want it to look shiny and clean. I will go over it with a wire brush before painting. Not interested in spraying it since I do not want any overspray to get on the body. Would something with primer already in it work?

Thanks.

 

[Donzi camino]

epoxy mastic

 

[mark#3]

I wonder if PORS-15 is what you would like?The black still dries shiny as far as I know.There is surface prep involved

 

[1MtnGoat]

Por 15

 

[zeke67]

Magic tractor enamel from Tractor Supply with hardener. Thin it from spraying. Google how to "roll and tip" the finish. You will end up a with a shiny, hard finish that is fairly smooth.

 

[AffableCurmudgeon]

Por 15 requires contact with bare metal to be effective. This undercarriage has been painted before and I don't want to grind off all the paint. I am looking to paint over existing paint. I do intend to use a wire brush to scruff up existing paint but not completely remove it.

 

[jkuro]

Clean it and paint it again. I would use rattle cans of your choice. Get some plastic drop cloth to cover the body. If the car never sees water or snow the paint will last a long long time.

 

[vwpieces]

nomorerust.com
AG111



I stopped using POR15 and then changed to Rust Bullet. Bullet is much better but Got tired of wasting leftover contents of the can because it goes bad after opening. Also humidity is usually high here and any portions that are a litle too thick end up with bubbles. That stuff is moisture cured and reactions start too quick here.

Now use the master series line. Pics are the AG111 with a brush

 

[Chuckster in NJ]

nomorerust.com
AG111



I stopped using POR15 and then changed to Rust Bullet. Bullet is much better but Got tired of wasting leftover contents of the can because it goes bad after opening. Also humidity is usually high here and any portions that are a litle too thick end up with bubbles. That stuff is moisture cured and reactions start too quick here.

Now use the master series line. Pics are the AG111 with a brush

I have used Master Series ^ for years and it is the BEST.…… The silver rust proofer is like water and it can reach nooks and crannies when dripped or poured.
Great company to deal with and fast shipping.

 

[metlmunchr]

POR 15 has so much marketing ******** attached to it that their corporate logo should be an outhouse.

Moisture cure urethane will stick to anything it gets near, including previously painted surfaces. Obviously, any paint with rust underneath can't be "healed" by MCU paint or any other coating, but so long as any loose rust or poorly bonded paint is brushed off, MCU will bond to existing paint and bare metal like nothing else will.

I've used Chassis Saver black MCU from Magnet Paint on a number of projects where I wanted to protect the underside from road junk and weather. Has worked great every time. It is available on Amazon for around $35/qt or $95/gal. Available in both gloss and satin finishes.

FWIW, POR 15 is just a highly marketed and overpriced MCU. I've used it in the past and found it to be no better or worse than other brands, but there's nothing magic about it to justify the price.

 

[Kaizen]

used rustoleam farm implement paint got at tractor supply. Cheap compared to everything else.
Rough it up and paint away. Used it on my truck and new gate i just built.
other stuff like por15 and eastwood chassis black requires priming and more prep. I would not do that unless you were doing a frame off.

Someday soon i'm going to do a video of por15 that i painted on a chevelle frame ten years ago. I used their 3 step process and did NOT top coat it to protect from uv. It sat outdoors for most of that 10 years. Just now getting back on it and while it is faded i have to use a sand blaster to get it off in a reasonable time. I was half expecting it to peel off from all of the bad reviewers but i'll tell ya it impressed me.

That said however, since i'm doing a lot of welding and filling on this frame, I'm spraying the eastwood chassis black.

 

[csp]

Tractor paint is an alkyd enamel and very, very durable stuff. It will give a glossy finish. The bad thing about it is colors are limited.

Any name brand paint store like Sherwin Williams or Benjamin Moore dealers (not big box stores) will have a larger selection of colors in alkyd enamels. Get the hardener too or you'll be waiting for several days for it to cure. If you roll it with a sponge roller you'll likely get little air bubbles in it. A little heat from a propane torch will remove them as they appear, but don't wait to long or they may be permanent. I've never tried to see if a heat gun will eliminate them.

 

[Improved700]

Ron Ananian , the Car Doctor swears by this stuff...

The Car Doctor Show | Ron Ananian – The Definitive Opinion on Automotive Repair

cardoctorshow.com

 

[AffableCurmudgeon]

To close the loop, I ended up using Rustoleum Farm and Implement low gloss black paint. Added a hardener to it as well. It turned out very nice. I used a foam roller and brush.