JHowell37

I tried using fiberglass to fill the holes and it looked good for a while. And then the fiberglass started shrinking.

I'd see if you couldn't pay a welder to come out to your place and weld them. That's cheaper then buying one yourself.

Fabio421

You can practice welding alum. by welding two pepsi cans together. Again and again and again.......

BC

Mine never shrank. I did them in 2003, and they are perfectly stable. My only concern is vibration.

dr bob

A glass-reinforced bondo-type filler should be ok. Don't dimple too deep, and use a backer behind the hole. Regular fiberglass shrink for a long time. I'm sure there are better filler options too. Visit your favorite autobody and paint supply store and get their recommendation. They may tell you to start off with a disc glued over the hole with urethane adhesive or epoxy, then finish with filler. Technology and techniques improve faster than I can keep track.

BC

I dimpled moderately deep, and then let the fiberglass sit in the sun over a couple of weeks as I slowly filled it.

Dean_Fuller

I FINALLY found a place to have it done...7:30 AM tomorrow. I'll have to drive the car over ( almost disassembled ) . I haven't messed with the computer on this car. I guess it would be best to disconnect.

BC

Yes, just get into that area to the right of your passenger's foot and make sure you disconnect both ECU plugs if its LH, just the one if its L-jet.

Dean_Fuller

Well my membership has expired so my signature is gone. Its a US 1980 model.

BC

Then just the one plug then. Easy peasy.

blown 87

I got some pieces of fenders from Mark A (I think) to use as patches for mine, here they are almost done.

I have a big Miller TIG, water cooled torch, etc and I hired some one who does this every day to weld mine.

Again, not a good place to try to do unless you TIG Al a lot.

Jerry Feather

Another process worth mentioning is the use of low temp aluminum soldering rod which you can use with a propane torch. I saw it demonstrated at Osh Kosh one year and bought some of it and used it to fill some rivet holes on my airplane cowling. I also found some of it at our farm and ranch store.

Giovanni

I bought some aluminum soldering rod from HB, work fine playing with aluminum cans but I would tig weld the holds to make sure they will hold good.

Dean, can I ask how its costing you?

Dean_Fuller

The place said $40 or $50 for all 12 holes. Thats as close to a quote as you can get here. We will see when I actually show up and have it done.

Giovanni

LOL, you will be driving in a 928/2=464 so they may even cut you a discount. That sounds like a great deal though...

Have you thought about the paint brand?

Lizard928

To comment on this, I would recommend a argon/helium (50/50) mixed gas for all TIG welding. You can also use straight ARGON for all TIG welding too, the helium helps penetration.

However this job can be done with both TIG or MIG. Mig will produce some spatter, but with both processes you need to know what you are doing. However with how small these holes are I would not bother with a backing piece of metal and would simply weld the hole up. If you leave the fender bolted to the car while doing this a good welder can do it all in one go without any warping. The doors can be off the car but same thing.
The steel rears are much easier to do without warping.

I have/use a miller 252 MIG and a Miller 350LX TIG.