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Building Tips and technical articles. => Paint and finishing => Topic started by: Bootlegger on April 01, 2009, 02:03:12 PM

Title: what is happening???
Post by: Bootlegger on April 01, 2009, 02:03:12 PM

   I am shooting clear butyerate dope 20% dope 10% retarder and 70% thinner,using an HVLP gun, the pressure at the gun is 15-20 LBS.
  The clear dope is "lifting & crazing"over the colors.  I mixed auto colors in the dope and using the same brand of dope and thinner this is happening. I have used these colors in dope on other models and didn't have this problem.
  If you have any suggestions please help...
              Thanks and best regards, Gil

Title: Re: what is happening???
Post by: Randy Powell on April 01, 2009, 02:05:51 PM

Gil,

Well, as I said, my bet is the retarder.

Title: Re: what is happening???
Post by: Wade Bognuda on April 02, 2009, 06:42:32 PM

This is what happens when you play chemist. HB~>

Title: Re: what is happening???
Post by: Clint Ormosen on April 06, 2009, 07:53:54 PM

That seems like a LOT of retarder. I'm not surprised it's doing weird things.

Title: Re: what is happening???
Post by: Terry Bolin on April 19, 2009, 06:22:40 AM

Try putting the first two or three coats of clear on very light... like over spray and let them dry 15-20 minutes between coats. The thinner seems high to me, could be acting  like a paint stripper. Very discouraging, to be ready for clear and have a problem. Post pictures.

Title: Re: what is happening???
Post by: Wayne J. Buran on April 20, 2009, 04:27:11 AM

I concur with Terry. 70% thinner plus 10% retarder is way to much. The retarder is slowing down the thinner from gassing off and its acting like stripper. I am sure some more paint experts will chime in but thats what I see.
thanks
Wayne