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Do paints interfere with action of cement?

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  • Member since
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Posted by spadx111 on Friday, January 27, 2012 7:44 PM

Ditto

Ron

  • Member since
    March 2004
  • From: Kincheloe Michigan
Posted by Mikeym_us on Friday, January 27, 2012 5:03 PM

the doog

Use superglue. Don't try to use regular solvents. You'll most likely wind up melting the paint together, which will stick the parts together, but you'll have a weak joint, and they may fall off in time.

Get yourself some superglue.

CA works to a point Doog but a weakpoint of CA is temperature and skin oil. I've seen bonds lose their bond above 90 degrees Fahrenheit and parts literally pop off at temperatures below freezing. And if your going to scrape paint do the locating holes first. Use a drill bit from a pin vise put it in the hole and wiggle it arounda bit and it sould clean out the hole.

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Posted by Chrisk-k on Thursday, January 26, 2012 11:40 AM

Thanks for the replies. I'll just scrape off paints. It's no big deal at all.

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  • Member since
    April 2009
  • From: Longmont, Colorado
Posted by Cadet Chuck on Wednesday, January 25, 2012 11:03 PM

Solvents such as Tenax will dissolve acrylic paints and really make a mess.  Use CA glue to avoid this, but best is to scrape off the paint no matter what kind of glue you are using, and use the smallest amount of glue possible.

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  • Member since
    March 2006
  • From: Right Side of a Left State
Posted by Shellback on Wednesday, January 25, 2012 9:15 PM

When i doubt ..............scrape the paint off .

  • Member since
    July 2006
  • From: Philippines
Posted by constructor on Wednesday, January 25, 2012 8:47 PM

I have cementede painted parts together and had no problem. But I prefer to use CA, it's stronger.

  • Member since
    January 2007
Posted by the doog on Wednesday, January 25, 2012 8:05 PM

Use superglue. Don't try to use regular solvents. You'll most likely wind up melting the paint together, which will stick the parts together, but you'll have a weak joint, and they may fall off in time.

Get yourself some superglue.

  • Member since
    November 2005
Posted by Anonymous on Wednesday, January 25, 2012 1:13 PM

Yes...

  • Member since
    May 2009
  • From: Hobart, Tasmania
Posted by Konigwolf13 on Tuesday, January 24, 2012 7:54 PM

bondoman

Those are solvents so they will not work through paint. They are good though, as you know.

The Tamiya (and I assume the other as well) will (or at least should) eat right through the paint given enough extra liquid (shouldn't nead much). Personally if I am gluing an already painted item I never scrape the paint, use the amount I would use if it wasn't painted and dont have problems with to much glue or not sticking/cementing/gluing

Andrew

  • Member since
    March 2007
  • From: Carmel, CA
Posted by bondoman on Tuesday, January 24, 2012 7:37 PM

Those are solvents so they will not work through paint. They are good though, as you know.

What does work is Cyanoacrylate (super glue). Beware though- the bond is really only as good as the paint is bonded to the plastic.

I tend to break up the process. For gluing wings and hulls etc. together, where scraping and sanding is to follow anyways, solvent glue gives a better bond IMO.

For tacking on details, which are usually prepainted as you say, superglue.

Often for a bigger surface, like a white superstructure to a wood colored deck, scraping off paint is necessary.

Both have their uses.

  • Member since
    March 2010
  • From: New Zealand
Posted by Scorpiomikey on Tuesday, January 24, 2012 7:31 PM

Its reccomended you do for a firm hold. But if your not worried about how hard its going to stick down, not really. I dont normally. If its a strctural peice i will and touch up later. but for the most part i dont.

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  • Member since
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Do paints interfere with action of cement?
Posted by Chrisk-k on Tuesday, January 24, 2012 7:19 PM

I used to assemble the entire kit and paint.

For the 1st time, I've painted small parts of an AFV (e.g., shovels, ammo boxes) before cementing them to the hull. Do I have to scrap off paints from the areas where I will apply a cement? Or, can a cement work through layers of paints? FYI, I use Tamiya xtra thin and Gunze liquid cements.

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