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InTheGarageMedia.com

BY “Rotten” Rodney BaumanPhotography BY THE AUTHOR

Repair or Replace title image
Part 1: A Time-is-Money Comparison
S

ure, we can salvage an original fender, but just because it’s possible doesn’t mean it’s practical. For our ongoing ’55 Chevrolet Second-Series project we’d decided early on to salvage as much of the truck’s original sheetmetal as possible. In theory, that still sounds pretty good. In retrospect, however, we should’ve focused harder on practicality.

As a crash-damage estimator I’ll admit I’m hit ’n’ miss. After all these (roughly 46) years in the panel-pounding profession, I still have that tendency to underestimate metalworking, as well as fillerworking, times. Now with embarrassing hours invested, I’ve done it again. I’ve worked way too hard on this truck’s original right front fender.

Over on the other side (the driver side) we’ve abandoned the original front fender and door in favor of reproduction panels from Brothers Truck Parts. At the time of our purchase the brand-new fender was just under $500. Even though shipping (to Montana in our case) might’ve cost about as much, it might’ve still been the better deal.

Since our project truck will be running both new-reproduction and used-original fenders, we have an opportunity to compare cost, quality, and perhaps, most importantly, that practicality we’ve been talking about.

While we’ve been working on other panels (cab, hood, inner fenders) we thought our front fenders were stored safely enough against the body stall wall. The used fender has already been abrasive-blasted and, for the most part, roughed-out metalwork was done during mockup when the truck’s front group was last screwed together.

E-Coat Quandary
Back in the ’70s, as painter’s helper at my first real job, the head painter there said this for the black coating that came on new OEM body panels: “That’s good primer! You can scuff ’n’ paint right over it.” A few years later, at another shop, I was retrained differently: “Unless we start from bare metal, there’s no guarantee.”

Like new OEM body panels, our new Brothers fender arrived with an E-coat or, if you prefer, an EDP (Electro Deposit Primer) coating. We think that description is a little vague as the terminology doesn’t state what the coating is actually comprised of. If by chance it’s thermoplastic (lacquer-like by nature) it should be removed. To determine our E-coat’s substrate suitability there’s an easy test. As we turn our attention to the new fender, let’s begin with a little demonstration.

At the time of this typewriting one dent remains in the used fender’s eyebrow. With that fender secured to a portable workstand, we can access the dent’s backside more easily now.

So, from the big brown corrugated-cardboard box, is our new-reproduction fender ready for the paint department? By this shop’s standards, no, but it’s seeming to be close.

On the truck, the new-reproduction fender has already been test-aligned with new and used adjacent panels. With minimal modification, the reproduction fender’s rearward edge matches the reproduction door’s forward edge just fine. Our original hood was crash damaged anyway, so we’ve done the work to make it fit in with its surroundings.

Perhaps like you, we hear other builders’ complaints regarding reproduction panel fitment. We’re always open-minded and willing to listen to those who’ve fought those types of battles. All we can tell you here is, to this point, on this job, we’re not having their exact same difficulties. Even so, let’s leave little room for surprises.

Soon you’ll see it anyway, so I might as well fess up to a little boo-boo—something that occurred months ago during our panel-alignment marathon. Back when we were going for gaps, the brand-new fender’s upper-rearward edge seemed low where it met the beltline edge of the door. Plopped atop the cowl a single body shim made the needed difference, but not before I’d hastily employed a Keysco leverage bar. If by chance you’re unfamiliar, that’s an age-old body shop tool—and it’s ordinarily my friend!

Not to distract too much from my own personal goofs, but do you ever get the feeling you’ve been somewhere before? Somehow it seems as though we’ve touched on the necessary fillerworking subject here—not so long ago. This time, rather than expounding deep technical details, let’s just focus on the aforementioned practicality. New versus old—let’s consider this a time-is-money comparison.

Original '55 Chevy truck fender and Brothers' new-production fender
1. So, here’s our starting point: one used-original fender, abrasive-blasted with roughed-out metalwork pretty much done, and one new-reproduction fender from Brothers.
Portable workstand with pool noodle DIY padding
2. We like to keep a fleet of portable workstands ready at all times. From Summit, this one’s close to 20 years old. Accessory ballast and pool toy padding not included.
Hammering out dents on inner fender
3. Earlier on the truck, this fender’s metalwork was addressed. The dented eyebrow’s B-side, however, was difficult to access. Here on the ’stand we’ll get a handle dolly on it.
Continued work on inner fender
4. In addition to its wrinkles, crinkles, lumps, and bumps, our original fender sports some cracks. There’s one side-to-side difference right there.
Pointing out seam on original fender above headlight
5. The used-original fender has a seam here above the headlamp at just about 2 o’clock. The new-reproduction fender does not.
Pointing out seam on new fender next to headlight
6. The new-reproduction fender has a seam here beside the headlamp at just about 3 o’clock. The used-original fender does not.
Steel gauge meter to check fender thickness
7. By our own measurements, the original fender’s skin is 18-gauge steel. The reproduction reads closer to 19-gauge—so let’s ease up a little with our hammer smacks from here.
Inspecting stains on new fender
8. Apart from surgically clean polyester dust everywhere, our body stall is an operating room. Here, however, on the new-reproduction fender, we see some sort of splatter.
Stains on original fender that have led to scale rust
9. Somehow, our abrasive-blasted original fender is also affected by mysterious splatter. In this instance it’s become scale rust, which won’t clean up so easily.
Dog holding teddy bear in mouth in shop hallway
10. Out the back door of the body stall is T-bone’s egress. When he reenters from his romp he’ll be slinging’ slobber in a side-to-side stride. Now we understand.
Sanding original fender with 80 grit on dual action sander
11. For starters, it’s 80-grit on a DA (dual-action) sander. Since abrasive-blasting left this fender rather porous, a flat DA pad may not reach deep enough into problem spots.
Sanding original fender with 3M Clean & Strip Discs on Harbor Freight die grinder
12. Near-spent 3M Clean & Strip Discs on Harbor Freight die grinders are doing the trick. If this wasn’t working, we’d be on our way back to the blaster—again.
Fillerworking original fender
13. Way too many (45.25) hours’ worth of fillerworking later, the original fender is ready for first-round primer-surfacer. We won’t be charging accordingly. That wouldn’t be fair.
Using gunwash solvent on paper towel to try to reflow new fender's E-coat
14. Using lacquer thinner, or in this instance Montana-compliant ’gunwash solvent on paper toweling, let’s see if we can reflow the new fender’s E-coat.
Holding paper towel on new fender
15. With our dampened toweling held in place long enough to bite (if it’s going to) we’re now attempting to rub the solvent in. We’re really trying to melt through.
New fender E-coat unaffected by solvent
16. Test results are in! This fender’s E-coat is unaffected. Theoretically, it could be abraded and recoated. On that note, perhaps we’ll strip areas that’ll receive body filler, only.
Cleaning new fender surface
17. First, let’s be sure this fender is clean. We’ll begin with a popular household cleaning product and then follow with solvent-borne grease and wax remover.
Using Keysco leverage bar on new fender
18. Earlier I fessed up to a little boo-boo. I was quick to pull a Keysco leverage bar on this rearward upper edge. Here I’m cleaning up after myself—and this repair is on me.
Smoothing down fender seam
19. For the short horizontal seam that the other fender (the used fender) doesn’t have, we’ll need to smooth things over.
Welding overlapping edge on new fender stretch seam
20. In this stretch the seam has three factory spot welds. Mrs. Rotten thinks the overlapping edge should be welded more solidly. Since it’ll end up under body filler, I’ll agree.
Using die grinder on fresh welds
21. This is a job for another little Harbor Freight die grinder. With a fairly fresh 3-inch, 36-grit, Roloc-type disc it’s smoothing Mrs. Rotten’s MIG knots away.
Using Summit Speed Blaster to remove porosity
22. Since we’re dealing with pits and porosity, let’s employ Summit’s little Speed Blaster. With its accessory Hot Spot conversion kit we’re keeping our mess to a minimum.
Abrading new fender E-coat with 180 grit on DA sander
23. So, never mind the bare steel area. I really don’t care to discuss that any further. Moving on, let’s abrade this fender’s E-coat with 180-grit on a DA sander.
Manual abrading with 180 grit sandpaper
24. For concave expanses where our flat 6-inch DA pad doesn’t quite conform, we’re abrading in a manual manner, again with 180 and a red Scotch-Brite pad.
Applying fiber-reinforced filler on fender
25. We won’t go deep into fillerwork this time, but we think this part bears repeating: Fillerwork over welding should begin with fiber-reinforced filler.
Smoothing filler with die grinder
26. Of course fiber-reinforced filler sands like a rock. To speed this process we’re using the same die grinder and what’s left of the same 36-grit Roloc-type disc.
Manual sanding filler with 40 grit
27. Finalizing initial fillerwork, we’re still working with boulder-grit (40-grit) abrasives. This time, from Summit, we’ll smear a thin skim of Evercoat Rage Xtreme for final fairing.
Continued sanding of filler with 80 grit
28. Beginning with 80, and finishing with 120-grit, our necessary fillerwork is fairly well completed. Through a surgically clean latex glove this feels pretty good.
Comparing finishes of both fenders
29. After all this work, are these fenders shaped exactly alike? Technically, no, but their minor variance should go unnoticed. On the same truck, they’ll get along just fine.
Brothers Trucks
(800) 977-2767
brotherstrucks.com
Harbor Freight Tools
(800) 423-2567
harborfreight.com
Summit Racing Equipment
(800) 230-3030
summitracing.com