Wurth SKS stone guard?

[Mike Kast]

I am in the middle of a change oil lines, drop oil tank to clean and paint and clean tar out of wheel wells and bring them back to thier original beauty, one wheel well at a time expedition.
I have very little original undercoating left in parts of the wheel well due to 25 years and 235,000 miles of sand blasting. I ordered the grey stone guard and the spray gun last night. I was wondering if I could use it over the existing undercoating and paint or if I should really only apply it over bare metal.
Anybody know about this stuff?
Thanks...

[KevinP73]

I use it all the time. Just clean the area and spray away.

[BGCarrera32]

Ditto. Try to get any loose junk or peeled undercoating scraped away but your prep will be minimal. The stuff is fabulous...

[Mike Kast]

COOL! Thank you gentlemen! You have told me exactly what I wanted to hear! It is clean. I have removed all the tar with mineral spirits and a tooth brush so I think any oil residue has been entirely exterminated. I may have to take a picture...
God I love that car! I am very very sick you know...

[Mike Kast]

I got the gun today. The instructions are in German. What is 6 bars in pounds of air? And what will be good to run through the gun to clean out the stone guard when I'm done? Thank you gentlemen.

[Jim Sims]

6 bars is around 90 psi. Clean the gun immediately after use with warm soapy water; you do not want the stone guard to set up in the gun! Suck the soapy water up through the gun like it was the stone guard solution. The stone guard tends to splatter all over the place so be sure and mask around the area well. Remember your eye protection. Cheers, Jim

[Zeke]

I shot this tank with the cheap gun you see on the tarp. I was about 4-5 feet away. Stuff goes on like drywall texture. Mask everything you don't want the SKS on including the floor or the wall behind you if you get in there and shoot back towards the inside of the fender.

[Mike Kast]

Zeke,
Did you shoot it over the old stuff or did you take the tank down to metal? If you did shoot it over the old stuff, how's it holding up?

[AFJuvat]

1 bar = 14.7PSI (@ sea level)

Had good luck running denatured alcohol followed by soapy water to clean up the gun.

AFJuvat

[RoninLB]

Originally posted by Zeke
I shot this tank with the cheap gun .

that looks like credibility to me. Looks good....... Ron

[Mike Kast]

I guess I should let you all see what I'm doing. I wish I took some pictures sooner. This is what I started with



This is where I am now. It has been a bunch of hours between here and there. There were two different types of tar in there. One was sprayed over the whole mess like a paint, the other was much more dificult to deal with. It was in the places that are the most vulnerable to catching road trash and dirt. I think it was done a long time ago. My oil tank was covered with pealed and pealing paint and was full of surface rust. I've got it cleaned up and will POR15 in a little while.




I have it as prepped as I'm going to. Its time to play with the stone guard!
Wish me luck!

[Mike Kast]

Oh... by the way. If you think you don't have 10 pounds of dirt up in and around the top of your oil tank eating up your car, You my be suffering from a little bout of denial. It is a wicked dirty mess up there... and I have sprayed it out and got up in there with a soapy sponge the best I could twice this year before I started this project... Its ugly folks!

[RoninLB]

I guess that stuff gets sold in gallon containers?.. does it get reduced with anything? use an old primmer gun or can it be brushed on? maybe the oil tank ? can it take the heat?

[Mike Kast]

We have a lift off! That stuff is great!

It was really easy. not nearly as messy as I thought it would be.

I'm gonna POR15 the oil tank. I'm even a little concerned about the insulating qualities of that. But I don't think it would insulate it as much as the stone guard. I figure its painted anyway so my paint will be just a little thicker. Two coats of POR15 is about 4 mil. The POR15 is really hard. It should be OK I think.
You can use a brush. But the gun gives it the factory look. For small patch repair on the pan I used 50 year painters caulk and that worked pretty well and is holding on good so far. Caulk is a pretty amazing product. Not silicone. Just paintable caulk, the best you can buy. I gobbed it with my finger to give it a texture but it doesn't match the factory application. The gun is the real macoy!



Now for the oil tank... I might get this thing back together by monday!

[RoninLB]

Originally posted by Mike Kast
Caulk is a pretty amazing product. Not silicone. Just paintable caulk, the best you can buy. I gobbed it with my finger to give it a texture but it doesn't match the factory application. The gun is the real macoy!

I never heard of painters caulk..

I just shot some por for some custom engine comp perforated metal. so I should do the oil tank, WTF........Ron

[Mike Kast]

Oh yea... Its sold in Liters for about $25.00 a liter. I think I could have done both rear wheel wells with that 1 liter but I shot it all into that one. Its water based and doesn't need to be reduced. It can be up to 2% according to the label 2%? Why bother?
As far as the gun goes, the factory gun was $60.00 and screws right onto the 1 liter bottle. It made it a really mess free job.
Zeke said it was messy with the gun he used. I don't know if that's because of the way we measure the word "mess" or if the gun he used caused more splatter.

[RoninLB]

hummm.. maybe I should use some extra preforated metal to fab an oil tank screen..

[Mike Kast]

I never heard of painters caulk..

The truth is... when I did it I was sort of embarrassed by the seeming hackyness of it. But after working with the Stoneguard and finding out its water based I think caulk it the perfect product for a small repair. Even better than brushing on stoneguard because it of its thick consistency.
I don't know? Flame away!

[RoninLB]

Originally posted by Mike Kast

Zeke said it was messy with the gun he used. I don't know if that's because of the way we measure the word "mess" or if the gun he used caused more splatter.

maybe using a paint gun is a "get the job done"

I've got this old huge undercoating contraption that is a big paint gun with big channels inside..

OK.. so I go to the paint supply store and ask for a quart "painters caulk"

[Mike Kast]

I have a picture of the screen that the cars came with on an oil tank thread here someplace. It looked like a piece of galvanized concrete mesh, about 3/8" or 1/2"holes crimped to the seam of the tank. Its here someplace if you search "oil tank"