Correct wheelwell 67 SWB detail

[Allen Henderson]

Detail guys and gals,

What is the correct finish in wheelwells for 67 911s? I believe it is a thin factory undercoating then covered with brush applied gloss black paint. Is this correct? Also, in this area was the undercoat also brushed or (somehow) sprayed on? Thanks.

-Allen-

[super9064]

I was striping my 68 wheel wells today, first layer green primer, in my case champagne yellow paint, black paint, tar undercoating.....layer of viper green, layer of who knows what red. I was planning on brushing on a black satin over the POR, would love to know, if I should use a gloss.

[boxster03]

just a top of my head guess as I have not looked at my P books for a while but likely 67 and 68 have different wheelwell finish.

[Allen Henderson]

FYI concours friend not on the this list....

"67 under coating........

Just the old tar based crap that always comes off on your hands...or what ever even brushes against it! Old style body shutz......tar! No paint.

Whenever I show my C coupe I warn the usual local (novice) judges that undercoating that doesn't come off on their hands in NOT original! All these restored cars have the water based, go on purple, dry black, Wurth under there, and it dries bullet proof clean and dry.

-Allen-

[tomkirkcis]

My car is on the rotisserie, detailing the bottom and wheel wells. The finish was the old tar schutz and it was falling off in sheets. We removed the schutz to bare metal and painted with satin POR15. It looks great but non original. While I was discussing what top coat to do with my restorer, a visitor at the shop said the old finish look alot like "spray on bed liner". I laughed at the suggestion, but the next time I went to the shop, my restorer had experimented with a spray bomb of the bed liner on a chunk of old sheet metal. He had tried the spray can with different spray patterns and had a sample that looked pretty damn good and the stuff is rugged as hell. Can't imaginine it chipping I can't believe I am even considering this. Somebody save me.

Tom

[Mudi]

i too have thought of using it in various ways. Some things to consider. I hear that it can have pinholes in the finished product and therefore allow some water penetration and consequent problems associated with that.

I also hear that it is heavy. I'm not into making my car heavier..

I'd check both out before you spray, might be hell to get it off down the road..

[304065]

My car is on the rotisserie, detailing the bottom and wheel wells. The finish was the old tar schutz and it was falling off in sheets. We removed the schutz to bare metal and painted with satin POR15. It looks great but non original. While I was discussing what top coat to do with my restorer, a visitor at the shop said the old finish look alot like "spray on bed liner". I laughed at the suggestion, but the next time I went to the shop, my restorer had experimented with a spray bomb of the bed liner on a chunk of old sheet metal. He had tried the spray can with different spray patterns and had a sample that looked pretty damn good and the stuff is rugged as hell. Can't imaginine it chipping I can't believe I am even considering this. Somebody save me.

Tom

Tom,

The Wuerth schutz for professional use comes in bottles that fit inside a special undercoating gun. This gun has a few different adjustments for pressure and spray pattern, etc. By experimenting with the gun it's possible to replicate the factory texture very closely. But it does take practice.

The old factory undercoating was applied over bare metal, which is why it "comes off in your hands"-- there's a layer of RUST where water permeated and rusted the bare steel, which then expanded and pushed the undercoating away. This is why it's possible to sandblast it off, unlike the LWB cars where sand just pushes it around.

[Fritter]

I reundercoated my '68 with Wurth High Build Underseal in the spray bombs. Looks fairly close to what was falling off before, and makes a very "clean" look with a slight pebbly texture.

BTW, after cleaning up under the car, I looked like a coal miner, I have a pic somewhere I will try to find and post.

[tomkirkcis]

I have been on the Wurth site and can not pin down which product the board believes to be the best match. I can not locate a listing for schutz. I see the sks stoneguard and the under seal product Fritter mentions. The only experience I have with a wurth product was with a very flexible, soft rubbery product that appeared to provide great protection, but looks nothing similar to the 67's tar like product. Which of the wurth products remains flexible but sets up firm like the old tar based product?

Appreciate the help

Tom

[304065]

I have been on the Wurth site and can not pin down which product the board believes to be the best match. I can not locate a listing for schutz. I see the sks stoneguard and the under seal product Fritter mentions. The only experience I have with a wurth product was with a very flexible, soft rubbery product that appeared to provide great protection, but looks nothing similar to the 67's tar like product. Which of the wurth products remains flexible but sets up firm like the old tar based product?

Appreciate the help

Tom

Sorry, "Schutz' is a generic German word meaning "protection" like "Schutzenhund. . . " the SKS, water based, is what I mean. But you must use the special gun to practice replicating the factory texture. The aerosol cans will not provide that texture.