undercoat

i-wagon

i-wagon

Well-known member
so I just picked up a few cans of undercoat, planning on rubbering the crap out of the underside of my car before winter.... I was wondering if I should take off my sideskirts and check for rust/ spray them, or if I should leave it. I know almost everyone in my family has bad rocker panels, and didn't know if the side skirt protected them on my car, or just trapped the salt and calcium to rust it faster.... any thoughts/experience?

 
They can and will trap crap in behind them!! Definitely take them off, and clean once in a while

 
thanks guys, I already did most of the underside and the rear wheel wells while bored waiting for paint to dry. I have tomorrow off and I'll tear them off and let rubber fly

 
What did you buy for undercoat and where abouts did you get it? Thinking about doing that to mine this year...

 
is it a myth, or fact, that undercoating traps moisture and allows the metal to oxidize even faster?

just what i've heard. anyone with facts?!?

another great corrosion inhibiting tip: coat your brake lines in battery terminal protector (that transparent red stuff). i've seen it done on a few GM 1500's (all of those have brake line blows outs within 8 years pretty much haha) and the lines look almost brand new under that stuff.

 
If the surface is not prepared properly it can trap moisture and cause rust instead of preventing it. A lot of the time it comes from the factory like that!!! That was one of the reasons a lot of the older cars rusted out.

 
just got done pulling side skirts, prepping masking and spraying. overall between the rear wheel wells, rockers and what i can get under the car having it just on ramps, I've put 3 cans of undercoat on it, and I'll probably do 1 more when I can get it on the lift at work, and i got my undercoat at wal*mart. around $4 a can

 
I'm not sure what the brand is, but the can with the red camero on it is the best. also it can trap moisture, also if you don't clean off previous rust or scale it will trap that in and oxidize faster.

 
degrease as much as possible. and prime if you can, the undercoating does not like to stick too well.
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so true. the day I melted undercoatings off while welding, and even watching it burn, I cheaply slapped on some rustoleum primer, and then gloss black, I just happened to have some. It not only stayed shiny since 2006 in an unlikely spots, it changed steel density. there is only one perequisite for real oil based paints, and that is the tempertures on instructions. Of course that means one of 3 days around a sunny solstice here.I tagged mine while it was barely cool to the touch sometimes, just after weld or grind.. kicks the diesels out of rusoleum, and have no clue what it becomes. I can hit it with a hammer. I almost give up on the rubber stuff. it seems hopeless even in quiet areas.

 
I saturate my frames/subframes with used oil on the inside, or any other places I can't reach. It's a new fall tradition.

 
Whatever just happened to scraping and sanding
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I saturate my frames/subframes with used oil on the inside, or any other places I can't reach. It's a new fall tradition.
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I used to do that to a couple '70s vintage cars I had, inner fenders and frames mostly.

 
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