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White "primer" on recessed surface of photo etch?

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dlh
  • Member since
    March 2017
  • From: Chambersburg, PA
White "primer" on recessed surface of photo etch?
Posted by dlh on Friday, January 18, 2019 3:44 PM

This is probably a dumb question, but what is that white "coating" on the recessed surfaces of some photo etched parts?  It seems to be on the recessed surfaces of badges etc.  Is it primer?  Is it there so you can airbrush a color and then wipe or sand the upper surface of the badge?  It's on the Mercedes badges of PE I just bought for a McLaren SLR.

Thanks,

Dave

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Saturday, January 19, 2019 3:45 PM

Could you post a picture? I don't recall seeing this on the PE sets i've worked with and am curious.

-Greg

dlh
  • Member since
    March 2017
  • From: Chambersburg, PA
Posted by dlh on Sunday, January 20, 2019 9:13 AM

Thanks for responding.  Here they are

Greg

Could you post a picture? I don't recall seeing this on the PE sets i've worked with and am curious.

 

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, January 20, 2019 10:40 AM

Those pics really help, thank you for posting them.

That said, I'm not really familiar with the PE manufacturing process so best I can do is guess.

Except I'm positive the white is not a 'primer'. It is most likely the stainless substate after the nickle silver is removed by chemical.

In any case, it is certainly safe to prime and paint as you would for any photoetch. That 'white' needs no special treatment.

I hope somebody who actually understands how PE is produced might chime in here.

-Greg

  • Member since
    December 2002
  • From: Bury St Edmunds, Suffolk, England
Posted by Bish on Sunday, January 20, 2019 11:00 AM

I am not familiar with car kits or this brand of PE. My first thought was that they might be emant to be like this and these parts should not be painted, like the pre coloured PE Eduard does, but seeing the pics i doubt it. My guess is it is a result of the etching process, maybe these guys do it different from others. I checked scalemates and while tehre are no reviews, there is an image of that set which also has the white areas.

I notice on the set and looking at the instructions that parts 2 and 5 are duplicated but it looks like you only need one of each. If so, take one out and test spray it. Thats the only way to be sure.

I am a Norfolk man and i glory in being so

 

On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3

  • Member since
    September 2012
Posted by GMorrison on Sunday, January 20, 2019 11:25 AM

This set is a type of brass called "Nickel Silver". Prior to the etching, the sheet stock has been polished. Where the etch produces a recess but not a cut through, the finish will be a matte finish produced by the etching chemical.

Nickel silver is a warm silver color, polishing it makes it appear more colorful.

These parts aren't plated, just polished.

 Modeling is an excuse to buy books.

 

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, January 20, 2019 11:43 AM

GMorrison
These parts aren't plated, just polished.

Ahah. I thought it was either a chemical plating or a laminate. Thanks for explaining.

-Greg

  • Member since
    December 2002
  • From: Bury St Edmunds, Suffolk, England
Posted by Bish on Sunday, January 20, 2019 12:13 PM

Thanks GM.

I am a Norfolk man and i glory in being so

 

On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3

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