Stone Guard Repair Advice Needed

I believe there is a product that welder’s can use when welding in a piece that is sensitive to heat transfer. The name and source has gotten lost somewhere in my 75 year old memory.
 
I don't know the answer to that, but my 42 Mercury Town Sedan had them and if yours did you should have 4 pretty good sized holes in the front of your fenders. Perhaps feel inside and see if you feel some weld or bondo repairs to fit the four holes. Two at the bottom of the rear fender on the front facing side and two more about 12" in from the bottom lip of the fender.
 
Here is a pic of my stone guard mounting holes. Running boards only extend out to about half the fender width, the guards protect the face of the fender. If you do not have any on your model, I would presume you got some paint chips.
 

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I think I can save the original stone guards on my 42 Mercury Town Sedan. That is, if I can manage to replace the fasteners. Several snapped off while removing and one had been broken for a while.
I can't feel how these are installed, not feeling a head throough the front. Are they molded in during manufacture and I cannot replace them.
Drill out all four and replace with a nicely decorated head fastener like a cariage bolt painted to match?
I'll hang up and listen. Thanks in advance.

If you do decide to drill out the studs and replace them with 1/4" bolts carriage or otherwise you can hide the holes quite well with "windshield kit" or dumdum as I used to call it. It bonds like sh*t to a blanket and has a dull lustre similar to you present stone guards. Did this on my wagon 40 years ago when they were v difficult to obtain. Give it a twist! B.
 
As I'm representing this vehicle as a WWII staff car, the military motor pools would do what they needed to do to meet minimum requirements. And, during that period, they used a lot of rivets. So having the carriage head bolt sticking out and looking live a rivet head, would not be significant. But if I grind down the head and recess it into the rubber and need to cover them your idea is a good one. With a carriage bolt in a round hole, you are limited to the torque applied to the nut, so I have used allen head cap screws and tightened them up to specs and then filled the allen key slot with bondo and sanded over. Looks like a rivet when painted and the bondo can be scratched out and allen key inserted if removal becomes necessary. I'm playing with them now and will post pics of the finished product, but will not install them until after OD green paint job on car.
 
My '41 Merc sedan coupe does not have them. Should it have them?

I'm no Merc expert, but '41 Fords did not have them and the Merc used the same body in '41. You might also ask this question on the Early Ford V-8 Club website.
 
Signsup, you may want to contact Jerry Windle on the earlyfordv8.org website. Really good guy and longtime editor of the V8 Times. He did a 42 Ford Army staff car and is donating it to the Early Ford V8 foundation museum in Auburn if I understood correctly.
 
Will do. Pics would be great. We made the rounds lf all the car museums in IN a few years ago including the Model T museum and the Studebaker Museum and the Packard Museum. Might be worth another road trip.
 
Not worth starting a seperate thread, so posting the question here...played with my stone guards today on my 1942 Mercury Town Sedan. Why are there six holes in the front of each rear fender, but only four bolts to attach the stone guards? Two additional holes approximately at the midway length the exact same dimensions as the other four hole, would seem to be a logical place to bolt two additional stone guard


Still undecided as to broken bolt repair, but if I drill out the broken studs and replace with small carriage bolt, I may just add two more bolts and install all six and get, perhaps a better, tighter fit. bolts, but there are none.
Fenders used on other models that did have a six bolt stone guard? Just curious
 
Not worth starting a seperate thread, so posting the question here...played with my stone guards today on my 1942 Mercury Town Sedan. Why are there six holes in the front of each rear fender, but only four bolts to attach the stone guards? Two additional holes approximately at the midway length the exact same dimensions as the other four hole, would seem to be a logical place to bolt two additional stone guard


Still undecided as to broken bolt repair, but if I drill out the broken studs and replace with small carriage bolt, I may just add two more bolts and install all six and get, perhaps a better, tighter fit. bolts, but there are none.
Fenders used on other models that did have a six bolt stone guard? Just curious
560485
 
Proof of concept attempt. Undecided if this is the final product, but drilled out broken studs from backside and drilled the "missing" bolt holes from the fender so that each stone guard receives 7 mounting carriage bolts. Fender washers on bakside, lock washers and nuts. Draws them up very tight and the carriage head bolts grab the bonded rubber tight enough to tighten them well.
I know the purist's will not approve, but going on a military staff car, the rivet look is not terrible. All will get a fresh coat of black rubber tire paint and we'll see...
 

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Not being a "pre-war guy", if someone told me that was how they came from the factory, I'd probably believe them.
 
Proof of concept attempt. Undecided if this is the final product, but drilled out broken studs from backside and drilled the "missing" bolt holes from the fender so that each stone guard receives 7 mounting carriage bolts. Fender washers on bakside, lock washers and nuts. Draws them up very tight and the carriage head bolts grab the bonded rubber tight enough to tighten them well.
I know the purist's will not approve, but going on a military staff car, the rivet look is not terrible. All will get a fresh coat of black rubber tire paint and we'll see...
562028
 
Well, then . . . mission accomplished. Now to put that WWII radio set under the dash where the heater used to be.
 
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