Actually you can reapply powder coating to fix flaws but of course some sanding and repair may be required. Sometimes parts come out of the oven with a dull finish. I commonly reheat them and apply a second thin coat while the parts are hot. Result is usually a high gloss finish. Due to the electrostatic bonding of the powder if the first coat is applied correctly the second will bond to it. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Powdercoat is the same as paint, bad prep = bad results and good prep = good results. Powdercoat is very durable and when applied correctly works very well. We send out our motorcycle frames and some other small parts for powdercoat for that reason. In regard to the touch up issue, I really don't know if that is an issue because we haven't had to touch up any powdercoat, yet. That being said, I would not paint or powdercoat the inside of any engine components.


Lawrenceville, GA

Again, surface prep and temperature along with proper curing time is important. Powder coat has a deeper bond than paint its tougher than paint and easier to apply. Paint will also come off in sheets if not properly bonded.

That said I don't doubt your experience and agree with your caution about using powder coat, especially on internal parts. The inside of that timing cover had to have been deeply soaked with oil and without proper cleaning and at least one full heat cycle to over 400 degrees the oil is still there and will cause adhesion problems. Aluminum and carburetor parts must be heat cycled, sometimes more than once, to "gas out" the contaminants the are in the actual pores of the item. Otherwise you get poor bonding and pimple imperfection in your finise.

As you can probably tell I had to learn the hard way on the aluminum and carburetors but haven't had any significant problems since. In each of the cases I blasted and sanded to remove the bad spots and re-coated the item with decent success.

On caution is that if you powder coat aluminum wheels don't let the carwash do their wheel clean chemicals. I've had two incidents with the Chrome type coating that turned completly grey after a trip to the carwash. The finish is nice and smooth just no silver/Chrome look left. I've re-coated them with minimum prep and had success. Chuck, definately not the pro, in New Hampshire

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Because when it come off, it comes off in big pieces...

When it's chipped and corrosion gets under it, how do you repair it? At least with paint you can touch up one spot. Powder coating is WAY over rated IMHO.
Just my 1¢ worth.

"The Master Cylinder"

Enjoying life at the beach in SOCAL

Hi brokengate. Quite possibly nothing would happen to the powder coating under normal service. Its, as you say, for the peace of mind.

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

I don't disagree with changing the part and certainly a low cost replacement makes it a no brainer for peace of mind, but if the stuff is that difficult to remove (ie torching, heavy duty blasting) why would it disintegrate and contaminate under normal service? Just askin'

Ted, Redding, CA

Brake cleaner or acetone, or mek will take paint off in no time. Maybe they will work as well on powder coat.


Lawrenceville, GA

Thanks, Chuck, I have another damper.

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

Powder coat requires temps up to 450 degrees I don't think I would trust a damper that had been heated that much. The Damper Doctor told me he powder coats his prior to assembly. I think I would have that damper rebuilt or just replace it. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

I expect the whole thing was done because he didnt want to take the time to mask off the inside. I actually removed the powder coat from the gasket surfaces with a razor blade. He also did the entire harmonic damper. I cleaned off the area where the seal goes with a razor as well. You could see that the seal didn't like running on the powder coat. I have been kindly offered another cover from one of our members for the cost of shipping so I will accept that. The powder coated one can be wall art.

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia