Author Topic: undercoating removal (Read 723 times)

VG30_S12 · « **on:** 02:05:41 PM / 30-Jul-12 »

pulled the suspension, underside looked dirty and peeled a bit, so I've decided to strip and recoat the underside of the front of the car. anyone know of a good way to get that gooey shit off?

StephenG · « **Reply #1 on:** 06:00:05 PM / 30-Jul-12 »

Heat gun and a putty knife? Dunno man, doubt there is going to be an easy way.

pakii-afa · « **Reply #2 on:** 08:28:50 PM / 30-Jul-12 »

wd40, drill w.soft wire wheel and cloth worked for me.
no theres no easy way, my way is messy yes but it works for me.

VG30_S12 · « **Reply #3 on:** 09:50:13 PM / 30-Jul-12 »

yeah after a few min with getting shit in my eyes i figgured this is bullshit... thinking about using stephens idea...
want to get chassis clean, but I'm doubting that shit...
will post pics for giggles though...

420-86notch · « **Reply #4 on:** 10:03:37 PM / 30-Jul-12 »

try some costic stripper they sell it at yourlocal hardware store it burns if you get it on you but that shit will take anything off

StephenG · « **Reply #5 on:** 10:20:43 PM / 30-Jul-12 »

Quote from: 420-86notch on 10:03:37 PM / 30-Jul-12

try some costic stripper they sell it at yourlocal hardware store it burns if you get it on you but that shit will take anything off

Yeah... I'm going to suggest you not do this.

420-86notch · « **Reply #6 on:** 11:11:56 AM / 31-Jul-12 »

just a suggestion ive never tryed to remove that stuff. sorry if it was a bad idea

VG30_S12 · « **Reply #7 on:** 12:51:18 PM / 31-Jul-12 »

dunno if costic stripper its the same as like kleenstrip, but yeah id like to stay away from that shit... stripped paint fins but burns like a mofo

Prolowtone · « **Reply #8 on:** 04:41:07 AM / 02-Aug-12 »

I would not want to slather that on whilst laying under the car..... just a feeling it is not such a great idea

VG30_S12 · « **Reply #9 on:** 10:11:29 AM / 02-Aug-12 »

yeah this is becoming a bitch... gummed up my sanding wheel and embedded my skin with black tar gunna try googone and paint scraper... heard that brake parts cleaner works to...
if that don't work, going to clean up best as i can, and recoat anyway

rednucleus · « **Reply #10 on:** 11:26:16 AM / 02-Aug-12 »

Better wear a hazmat suit before you get back under there - or flip the car upside down ist

VG30_S12 · « **Reply #11 on:** 01:23:23 PM / 02-Aug-12 »

wanting to make a harborfrieght rotisserie(youtube it lol) but that's a fight for another day...
i haven't been able to get anything done... I'm a pussy when it comes to heat and only time its bearable is when its about to rain

tommy · « **Reply #12 on:** 03:58:50 PM / 02-Aug-12 »

Here's how I did it on my TE31... it was also covered in anti-rust grease... if you think your shit is bad, you should've seen mine...

First off, start by laying cardboard on the floor... or anything that you'll throw away after....

You soak a rag in kerosene (I used a leftover gallon of engine degrease that the previous owner had bought, but it's what it is... expensive rebadged kerosene). You use it to softer up the undercoating a little.

They you use a very narrow putty knife...

and scrub the as much as you can...

Then you use some more kerosene to try and disolve what's left

(This is to show the difference where they used undercoating and where there was only antirust grease)

and you finish up with an other rag diped in varsol to try and get the adhesive out of there

Finish up with a wiremesh wheel on an angle grinder and your good to go...

One thing : Like you, I did it laying on my back, but you need to work above the area that you are not under... even there, you'll be a mess after that... but it's better that to have varsol driping in your face... oh and please do wear some glove... I can't work with glove, but I had to do that with some

Oh and this is about 1/4 of what came out from under there...

Good luck... but nothing beats the piece of mind of knowing that there is no rust under your car... and that you can spray it with a nice modern undercoating and that it'll be protected for years to come...

Apart from the exhaust, that doesn't look like a 35 year old car

VG30_S12 · « **Reply #13 on:** 04:23:14 PM / 02-Aug-12 »

thanks for the tips and even more so for the pics (visual always wins)
i actually just started trying that tactic and also 3m black wheel on a drill, but i don't have any karosene so I'm using the power of oranges (goo gone) with agasket scraper... seems to work pretty good after time to soak
will give karosene a try too...

that underside looks smexy, what did you use to undercoat it?

tommy · « **Reply #14 on:** 04:47:31 PM / 02-Aug-12 »

about 7 cans of cheap undercoating from the parts store... well not the cheapest that is non hardening and non paintable but the second cheapest, the one that is paintable. I think it's something like asphalt/rubber. It cost something like 7$ a can for a total of 50$ to do all the underside, the rear wheel wells, the underside of the front fenders and the front fender support... and I think I didn't finish the last can. Only thing I did before applying it was wash the parts with methanol to disolve any grease, kerosene or varsol leftover

If I were to do it again, I'd probably use a bedliner kit that they sell for something around 100 or 120$ instead of the undercoating can... cost twice the price, but that thing is sure to be able to take a hell of a beating and ask for some more right after

pakii-afa · « **Reply #15 on:** 10:10:29 PM / 02-Aug-12 »

i havent done mine yet but i plan to, i know the wire wheel is messy but it does quite the trick. i had a bunch of in my "new" fender so i used about half a can of wd40 and soaked, it made it very runny and about 80 perfect of the oil just ran off in after about 30 mins of sitting (thing with wd40 is that it needs to sit on/around whatever your trying to remove, not drip off). then came wire wheel and drill and wd40 sprayed cloth so the left over oil sprayed from the wheel didnt smudge, then dry clotch and it was 99 perfect spotless. although i must say it was far to time consuming so i can only imagine how long underneath of the car would take.

Prolowtone · « **Reply #16 on:** 05:50:16 AM / 05-Aug-12 »

I want to do it but........ i need somewhere other then my tiny/ narrow/busy garage to do it in without shit from mom or her boyfriend

. Think i will wait the 6 months till we get a house with better garage access

.

I think i will be doing the bed liner coating on both of my s12's

VG30_S12 · « **Reply #17 on:** 02:48:34 PM / 16-Aug-12 »

Ok, ive scraped a lot off, and now im nearing finishing and I've got to get the wax tar ect off before welding a lil, most stuff i looked at said flammable
Any thoughts to get the surface preped for welding/painting?

cutter67 · « **Reply #18 on:** 03:17:57 PM / 16-Aug-12 »

i have had good luck with these doing clean up and prep work

Prolowtone · « **Reply #19 on:** 07:21:28 AM / 17-Aug-12 »