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Sand Blasting Powder Coating ?


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#1 Texas Deere and Horse OFFLINE  

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Posted April 23, 2015 - 03:50 PM

Just wanting to see if anyone has sand blasted any power coated sheet metal like the heavy powder coat on JD stuff?


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#2 mrmr56 OFFLINE  

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Posted April 23, 2015 - 04:16 PM

I did once. It will come off if the blast media is fresh and sharp. If it has been used a while, get ready for a long drawn out session with the blast cabinet.
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#3 JBRamsey OFFLINE  

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Posted April 23, 2015 - 04:16 PM

Removing powder coat is tough to do. You need a strong high volume compressor, a good blaster and aggressive media.
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#4 petrj6 ONLINE  

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Posted April 23, 2015 - 06:38 PM

  watch out for that on sheet metal, the blaster can warp the metal if you blast on it for to hard or to long.

                                                                                                                           Pete


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#5 superaben OFFLINE  

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Posted April 23, 2015 - 08:21 PM

Brian, I tried to do it once and decided it was well worth sending to my local sandblasting shop.

 

Ben W. 


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#6 Jazz OFFLINE  

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Posted April 23, 2015 - 10:04 PM

Try 3M sandblasting discs. I use them on vintage autos for large areas so only the hard to reach places need to be sandblasted. 36grit sanding discs is another alternative to remove heavy coatings of paint and/or rust


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#7 petrj6 ONLINE  

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Posted April 24, 2015 - 04:43 AM

   If the powder coating is in good shape why remove it ?  if it is not all rusted to death or really in bad cond just sand it down a bit and paint over it. powder coat makes a great base for any paint and is easily sanded really smooth. 

                                                                   Pete


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#8 Texas Deere and Horse OFFLINE  

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Posted April 24, 2015 - 06:05 AM

   If the powder coating is in good shape why remove it ?  if it is not all rusted to death or really in bad cond just sand it down a bit and paint over it. powder coat makes a great base for any paint and is easily sanded really smooth. 

                                                                   Pete

 

Pete, it is rusted really bad where the PC has come off, so it will be a job.

 

  watch out for that on sheet metal, the blaster can warp the metal if you blast on it for to hard or to long.

                                                                                                                           Pete

 

 

that's what I'm worried about.

 

Brian, I tried to do it once and decided it was well worth sending to my local sandblasting shop.

 

Ben W. 

 

This is my thoughts also, ley the Pros take care of it.


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#9 WHdbJD ONLINE  

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Posted April 24, 2015 - 06:39 AM

The only parts I blasted down to bare metal on my JD 318 were the panels
and battery tray that were corroded by the battery acid.

The rest of tractor was lightly blasted to "rough" them up a bit,
then two coats of primer over the powder coat. Then 4 coats of
green allowed to cure and wet sand by hand between each coat, with
800, 1000, and 1500 grit.

jd 318 002.JPG
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#10 Texas Deere and Horse OFFLINE  

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Posted April 24, 2015 - 09:51 PM

My problem is that part of the fender pan is pealed and badly rusted and part of it is still good powder coated.



#11 shorty ONLINE  

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Posted April 25, 2015 - 06:59 AM

That is what I have found with powder coated peices. There is no sign of trouble until a bigger section peels off. Rust can travel behind the paint without being obvious. With spray paint, it usually bubbles where it starts.


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#12 Texas Deere and Horse OFFLINE  

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Posted April 25, 2015 - 07:11 AM

Will Electrolysis take off powder coating?



#13 Texas Deere and Horse OFFLINE  

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Posted April 27, 2015 - 07:18 PM

BUMP !!

 

Will Electrolysis take off powder coating?



#14 Talntedmrgreen OFFLINE  

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Posted April 30, 2015 - 01:28 PM

I don't' believe so....if I understand electrolysis correctly, it decomposes rust, not necessarily paint or other applied finishes.  

 

I recently tried my and at this, on some small brackets for a mower redo.  The rust was long gone after several hours bubbling away, but the painted areas remained...painted.  If there is loss of adhesion and rust behind your powder coat, then it should fall away as the rust is removed, but would have done that without electrolysis.


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#15 Cvans ONLINE  

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Posted April 30, 2015 - 10:50 PM

I am NOT a fan of powder coating. Once you get a chip in it I'd swear that it promotes rust. 

I hope you get  this figured out Brian as the stuff is nasty to work with.


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