Thread: Oil undercoating

Any one oil undercoat?
Bar and chain oil?
Any one try Fluid Film undercoating?

Bought 2002 ssei w/43,000 miles from NC and want this 12 year old car to last.

I have never seen it done around here, however it seems as you want to try it Ed??

I know you know about the rust issues. But other than the Front near the wheel wells, and the rear gas door there isn't much on the Body that will rust. I would Paint the suspension components to keep them rust free

My 2003 has been in Chicago it's entire life. I've never done any kind of undercoating, just thoroughly rinse the car top and bottom as best I can during the winter a couple of times. Only rust I have is the typical gas door rust, which only has a couple dimples showing as of now. Grrrrr..

Rest of the under body is completely clean, same goes for subframe, suspension components, mounts, etc etc. Compared to the 92-99 Bonnevilles and the GPs, it seems that the 2000+ isn't as prone to rust.

Originally Posted by nos4blood70

My 2003 has been in Chicago it's entire life. I've never done any kind of undercoating, just thoroughly rinse the car top and bottom as best I can during the winter a couple of times. Only rust I have is the typical gas door rust, which only has a couple dimples showing as of now. Grrrrr..

Rest of the under body is completely clean, same goes for subframe, suspension components, mounts, etc etc. Compared to the 92-99 Bonnevilles and the GPs, it seems that the 2000+ isn't as prone to rust.

I do that, anytime it hits above freezing i go through the touchless wash that has underbody water jets.

Sent from BFE

I know a guy that hot oil coats under bodies. He has done it to all his trucks

My 03 Bonneville has 210,000 miles and the rockers and the gas door area have been repaired. Gas door area goes first, rockers rust second, inner front fenders and spring seats are tied for third. Don't think these cars don't rust!!!! They due.

It has seen every snow fall and all the salt in Pennsylvania and Ohio as a daily driver for 11 years now. My daughter drives it now (with a 3.8 pulley) headers, cam, gen 5, intercooler, 3" exhaust and 87 octane.

Lot guys from work swear by oil undercoating and do all there vehicles every year. Motor oil, bar and chain oil, and now fluid film is beckmg popular. Guy from work has 2001 chevy pickup daily driver that has never had any rust work don't to it and it doesn't need anything because the last 7 years he oil under oats it before thanksgiving every year.

Motor oil wears off to fast. Only 1 winter through 1 coat, durable enough for 1 coat. High traffic areas underneath would need more, but I get a little lazy the colder it gets outside.

Turp and BLO go together, nothing else. Used to aid int he drying process, I think I did mine in october it was just a TADDDD tacky at the 4th day. 2nd day it was like you just put it on. Yellow oil paint isnt needed, but oil paint is durable and color is always nice. Get tired of yellow? Get blue, tired of blue, go red! No crazy prep get the crap off and put on another layer of your choice of mixed blo/oil paint/turp.
db7102d2addb3d9fa5203030a428f6e0 by smetters20, on Flickr

1st coat
t9k6 by smetters20, on Flickr

1st coat after a few days
fd5a7706a1af2b28615e2e0c26e25366 by smetters20, on Flickr


1 year later
Untitled by smetters20, on Flickr

You can see the high wear areas after a year and 1 coat. I love it. I did a touch up on a few spots last weekend with a garden sprayer... dam driveway is yellow oops.

Didn't that stuff stain your hands for a few weeks?

Sent from BFE

no that was rust bullet.

Do you drill holes in the rockers so you can spray internal? They have plastic plugs to cap the holes when done.

I've seen all the different recipes, fluid film is expensive but is made to do the job the as is.

Originally Posted by sseilmnop

Do you drill holes in the rockers so you can spray internal? They have plastic plugs to cap the holes when done.

I've seen all the different recipes, fluid film is expensive but is made to do the job the as is.

I rebuilt the rockers with new metal so they were rust bullet covered before welded back on, they are sealed up with drain located to rear tire now.

eastwood sells their internal frame coater if you wanna spray inside your rockers.

Originally Posted by ITHURTZ

Motor oil wears off to fast. Only 1 winter through 1 coat, durable enough for 1 coat. High traffic areas underneath would need more, but I get a little lazy the colder it gets outside.

Turp and BLO go together, nothing else. Used to aid int he drying process, I think I did mine in october it was just a TADDDD tacky at the 4th day. 2nd day it was like you just put it on. Yellow oil paint isnt needed, but oil paint is durable and color is always nice. Get tired of yellow? Get blue, tired of blue, go red! No crazy prep get the crap off and put on another layer of your choice of mixed blo/oil paint/turp.
db7102d2addb3d9fa5203030a428f6e0 by smetters20, on Flickr

1st coat
t9k6 by smetters20, on Flickr

1st coat after a few days
fd5a7706a1af2b28615e2e0c26e25366 by smetters20, on Flickr


1 year later
Untitled by smetters20, on Flickr

You can see the high wear areas after a year and 1 coat. I love it. I did a touch up on a few spots last weekend with a garden sprayer... dam driveway is yellow oops.

I love the oil paint, you can see how much is on and how much is left next year.

If you wanna sand it down underneath and get it really clean rust bullet or kbs coatings has some 2 step rock hard coatings. Depends how labor intensive you wanna go.

I get it undercoated with parafine/wax oil, green rustcheck stuff. Got holes drilled in panels with plastic caps that goes on them so they can just spray everywhere in the panels and the undercarriage. Get it done once a year. Doesn't drip, doesn't smell bad, help a ton.