I want to undercoat but want something not that expensive.. Will do myself..

3M makes a decent undercoat for a reasonable price. Why do you want to undercoat it? In most cases it does more harm than good on a classic car.

I simply used a 2 part etching primer and DP90 epoxy primer on the bottom side of my car. Its still holding up very well.

I have thought about using the truck bed liners but I heard they can be a fire hazzard. So that has me thinking twice. I have considered using the 3M undercoating in the wheel wells to keep the noise of flying debrie down.

I used the 3m, put it on inside of panels before installing them and have done the wheel wells. Shot it inside the rockers, it turns hard and sticks nice, I plan on doing the rest before putting it all together

There seems to be two versions of the 3m undercoat in 1quart bottles will any work...how many quarts would i need for underbody and wheel wells...dirty under there and i wire wheel it half of it already

The quart bottles are set up for those with the correct sprayers (and air compressors) for undercoating.

The smaller version is a pressurized "spray bomb" type can for those of us without the spraying equipment.

How many undercoat cans would it take to do whole car

And how many coats

No idea. I only did the wheel wells.

How many it took for wheel wells

Buy 5 when you run out buy more, guarantee it will take at least 8 to put on 2 good coats. Cut corners and do it in 5, non the less it takes what ever you want to put on it.

I'm currently in this process and just finished coating the frame rails with zero-rust (chassis paint). I plan on spraying the floor boards at least where the rockerpanels meet the floor boards with zero-rust as well. Should I leave it like that or do I need to spray rubber undercoating on top as well? I am worried about stones and paint chips if I don't undercoat, or is this not an issue?

I shot undercoating all over the underside of mine with rattle cans. Didn't count but I'd guestimate I went thru at least 8 or 10 cans by the time I was done.

Was not building a show car...mines very much a driver.

Any body like rustoleum rubber undercoat??? Really cheap less than $4 a can

You get what you pay for

Check out Eastwood, their products are top-notch.

Hi everyone, I didn't want to start a new thread on undercoating so I figured I'd ask here. I'm currently refreshing some parts of the underbody (rocker panels and outer edge of floor pans). The rubber undercoating flakes off easy in those areas with a putty knife. The paint underneath the rubber is mostly intact.

I was going to spray these sections with zero-rust (similar to black chassis paint) and then some rubber undercoating. I was not sure if I should spray rubber undercoating or not and just leave it painted black chassis paint only since it is only driven in spring and summer and only dry days. If I did use rubber I was going to use either 3m 08881 or 3m 08883 rubber undercoating, 0881 is medium roughness $10, 08883 it's coarse and $15.

What do you guys think is the best approach. I start spraying Wednesday. Thank you guys.

Anyone?

Start new thread maybe they answer there