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Stripping paint off old brass

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  • Member since
    August 2011
  • 805 posts
Stripping paint off old brass
Posted by narrow gauge nuclear on Wednesday, April 25, 2012 11:17 AM

I have a nice old Sunset D&RGW K-28 brass loco that I just purchased.  It was apparently painted back in the 70's, maybe with a brush!  The decaling is terrible and I need to strip it down to the brass.

Any of you guys have a preferred method for doing this?

Richard

Richard

If I can't fix it, I can fix it so it can't be fixed

  • Member since
    March 2007
  • From: South Carolina
  • 1,719 posts
Posted by Train Modeler on Wednesday, April 25, 2012 2:47 PM

I would take the motor, wires--all electrical and plastic out and disassemble then soak in some MEK.   That stuff is volatile, but effective.   Wear gloves and have lots of ventilation and NO source of ignition.   It will melt plastic.    If you're not wanting a "flame thrower and quick", then paint thinner can work with effort and time.    If you use MEK, I wouldn't let it sit for a lengthy period.   After MEK, go to paint thinner or mineral spirits then wash.

Richard

  • Member since
    February 2012
  • 596 posts
Posted by charlie9 on Wednesday, April 25, 2012 3:20 PM

don't overlook the insulation used on the wheels.  some solvents will attack it too.

charlie

  • Member since
    July 2004
  • From: Weymouth, Ma.
  • 5,199 posts
Posted by bogp40 on Wednesday, April 25, 2012 3:21 PM

Brake fluid is a bit safer and will do the job. Do note that all details may not be soldered and could loosen. Just carefully scrub w/ a small brush.

Modeling B&O- Chessie  Bob K.  www.ssmrc.org

  • Member since
    August 2006
  • From: Franconia, NH
  • 3,130 posts
Posted by dstarr on Wednesday, April 25, 2012 3:44 PM

Brass is easier to strip than plastic, 'cause brass won't dissolve in whatever you use against the paint.  Beware of getting your paint remover on any wires or the motor, 'cause it will eat the insulation leading to dire short circuits.   Other plastic parts  might be gears, draw bars, and insulation in the wheels.  

   If the paint is lacquer (Floquil)  then lacquer thinner will get it off.   If the paint is water based then commercial paint remover will surely get it, and milder solvents like Pinesol or alcohol or Tri Sodium Phosphate (TSP) in water may work.  

  Was it me, I would take the locomotive apart enough to separate the non brass parts from the brass parts and soak the brass parts in paint remover until the paint crinkles up.  Then scrub with a toothbrush.  You may need to  make two passes to get it all. 

   All the paint removers are very active and can eat the floor, the finish off the kitchen table, anything plastic or painted.  Beware of spills 'cause they can make a horrible mess.   Dirty rags left over from paint removing can eat the finish off anything they are placed upon. 

MEK is considerably more active than lacquer thinner.  After some really PITA accidents involving MEK spills I try not to use MEK unless I really need to.  Lacquer thinner is active enough to deal with lacquer.

  • Member since
    August 2011
  • 805 posts
Posted by narrow gauge nuclear on Wednesday, April 25, 2012 4:20 PM

Thanks for the tips.  I'll try the laquer thinner as I have some on hand.

I have already stripped the model down and removed the motor and its single wire (old pitman).  Plastic parts on an older brass model!?  You gotta be kidding me.  Pure brass thru and thru.

I will not be soaking the wheels, frame and valve gear as it is good to go, as is.  It is mainly the boiler/cab and tender that are getting th' treatment.

I'l keep everyone updated on how this came out.

I have a modern can motor with 6.3:1 reduction on order.  The pitman can't hack the crawl speeds that I demand.

Richard

Richard

If I can't fix it, I can fix it so it can't be fixed

  • Member since
    April 2004
  • From: Ontario Canada
  • 3,574 posts
Posted by Mark R. on Thursday, April 26, 2012 7:01 PM

Air blastic with baking soda is the only method I use for stripping brass. I've found chemical removers of any kind just won't get it 100% clean. Air blasting gets EVERYthing off, won't hurt the solder joints and provides a nice satin finish that really helps the paint to adhere.

Mark.

¡ uʍop ǝpısdn sı ǝɹnʇɐuƃıs ʎɯ 'dlǝɥ

  • Member since
    January 2004
  • From: Canada, eh?
  • 13,375 posts
Posted by doctorwayne on Thursday, April 26, 2012 8:01 PM

Lacquer thinner worked great to strip this old Akane:


,,,and even removed the cab  Smile, Wink & Grin (which I was going to replace anyway):


Wayne

  • Member since
    January 2012
  • 3 posts
Posted by Ed OR on Thursday, April 19, 2018 3:15 PM

I am trying to get some very old Floquil off Walthers car sides and ends to ressurect an old car. I have started out with denatured alcohol, will try laquer thinner next.

 

Ed

 

  • Member since
    January 2004
  • From: Canada, eh?
  • 13,375 posts
Posted by doctorwayne on Thursday, April 19, 2018 3:47 PM

Another good paint stripper is Super Clean, and it works on plastics, too.  Available at Walmart.

Wayne

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