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Old 07-23-2014, 12:09 AM   #1
hd74
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Default Powder Coating over Chrome

Anyone have any success powder coating over fresh chrome plate?
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Old 07-23-2014, 05:34 AM   #2
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Default Re: Powder Coating over Chrome

I had some chrome forwards done a long time ago; the powder stuck with no problems.
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Old 07-23-2014, 09:47 AM   #3
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Default Re: Powder Coating over Chrome

Yeah, no worries if the chrome is good. The only real problem is if the chrome peels.
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Old 07-23-2014, 10:21 AM   #4
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Default Re: Powder Coating over Chrome

Bead blast the chrome first, being careful not to peel any off. Clean up with acetone & virgin paper towel while wearing nitrile gloves, position part in its cooking position while still wearing the gloves, preheat for 30 minutes @ 450*, coat, bake to an even runout (~5 min) @ 450*, cure for 20 min @ 400, don't touch the powder until it cools down or you risk smearing the finish.

This is for standard powder; there's a different procedure for hi-temp coatings.
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Old 07-24-2014, 11:18 AM   #5
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Default Re: Powder Coating over Chrome

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Originally Posted by Grinder Bill View Post
Bead blast the chrome first, being careful not to peel any off. Clean up with acetone & virgin paper towel while wearing nitrile gloves, position part in its cooking position while still wearing the gloves, preheat for 30 minutes @ 450*, coat, bake to an even runout (~5 min) @ 450*, cure for 20 min @ 400, don't touch the powder until it cools down or you risk smearing the finish.

This is for standard powder; there's a different procedure for hi-temp coatings.
Sounds solid, heading to a local coater to see what they use to mask there parts.
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Old 07-24-2014, 01:09 PM   #6
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Default Re: Powder Coating over Chrome

They sell the masking tape for this purpose on ebay.
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Old 07-24-2014, 01:45 PM   #7
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Default Re: Powder Coating over Chrome

I use two different hi-temp masking tapes; one looks like fiberglass tape with the linear strands, I use this as general purpose. The other, more expensive tape is hi-temp silicone based, this gets used where trimming with the exacto knife is required: it cuts clean where the 'glass tape frays.

Both styles come in several widths but I only buy the skinny stuff. If I need to mask a large area I use aluminum foil and tape down the edges.

edit: before and after shots of the chrome oil tank, battery box and clutch arm


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Last edited by Mr Bill; 07-24-2014 at 01:56 PM.
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Old 07-24-2014, 07:08 PM   #8
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Default Re: Powder Coating over Chrome

I haven't seen the reinforced kind; I'm using the green plastic stuff. Seems to work fine.

Also I use those tapered silicone plugs for keeping holes clean. Here's my setup:


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Old 07-24-2014, 09:50 PM   #9
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Default Re: Powder Coating over Chrome

mmmmm...... Modified double wall oven... Very Deluxe. I'm still using a single Harvest Yellow Admiral range with a side of toaster oven.
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Old 07-25-2014, 08:46 AM   #10
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Default Re: Powder Coating over Chrome

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mmmmm...... Modified double wall oven... Very Deluxe. I'm still using a single Harvest Yellow Admiral range with a side of toaster oven.
Haha! My operation is the same, except I'm waiting on getting the 220 outlet installed in my garage.
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Old 07-25-2014, 11:53 AM   #11
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Default Re: Powder Coating over Chrome

Here are the two parts to be PC. What I've done here is masked off the areas with Gorilla tape. Any suggestion on what PSI for the blast?

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Old 07-25-2014, 10:38 PM   #12
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Default Re: Powder Coating over Chrome

Wow... those are hard on the eyes (so are the reflections...)...

You want to just dull the surface when blasting, to give the powder something to grab on to. I run my blaster at 60# with #6 glass bead for everything (it's pretty much used only to prep for powder).
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Old 07-28-2014, 04:21 AM   #13
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Default Re: Powder Coating over Chrome

Gosh them sure are some pretty bits!
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Old 08-02-2014, 11:52 AM   #14
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Default Re: Powder Coating over Chrome

The black oil tank used on a stock FLSTS (Heritage Springer) is factory powdercoating with brand new chrome underneath... I've seen in two occasions that the coating on the oil tank could be pulled off as a plastic cover... That's why I know the chrome under there was brand shiny new..
I also noticed that the black risers on a Softail Springer Night-train is factory black powdercoating over brand new chrome..
So I guess they used more coated black parts on some models with new chrome underneath..
Just saying..
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Old 08-03-2014, 04:46 PM   #15
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Default Re: Powder Coating over Chrome

Thanks for all the info guys and so this is what I did with it so far. After masking I bead blasted both fender and tank, if you look closely at the pix you can see some frosting. Even with the reduced air pressure their was still some bobbling of the plating. The good news it was all in non critical areas. After getting them home I washed them and put them in the oven
@450 for 20 min. just to be sure they will make it through the powder coating process. I will re-mask the areas I want to keep shinny and hopefully I will get them coated tomorrow.

Anyone see any problem in sanding away problem areas?

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Old 08-03-2014, 06:57 PM   #16
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Default Re: Powder Coating over Chrome

Define "sanding away problem areas"... Not sure what you mean...

Although I can see the pitting in the chrome they're still too shiny for my liking; if you're not comfortable putting them back in the blast cabinet, consider scratching up the surface with 80 or 100 grit paper. Use fresh paper and don't be shy about changing it out when it loses its sharpness.
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Old 08-05-2014, 07:46 AM   #17
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Default Re: Powder Coating over Chrome

Although I can see the pitting in the chrome they're still too shiny for my liking; if you're not comfortable putting them back in the blast cabinet, consider scratching up the surface with 80 or 100 grit paper. Use fresh paper and don't be shy about changing it out when it loses its sharpness.[/QUOTE]

I considered both methods but felt the texture of the bast will do the job. Dropped the fender and tank off yesterday at our local coater, hopefully I will see them back later today.
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Old 08-07-2014, 08:07 PM   #18
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Default Re: Powder Coating over Chrome

Powder applied, next step is paint.
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Old 08-07-2014, 08:46 PM   #19
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Default Re: Powder Coating over Chrome

Sweet. Going to pinstripe?
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Old 08-08-2014, 08:13 AM   #20
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Default Re: Powder Coating over Chrome

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Sweet. Going to pinstripe?
The powder was just to give the paint something to hold on to...
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