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Help! How to fix paint crazing

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  • Member since
    November, 2013
Help! How to fix paint crazing
Posted by bstarr3 on Wednesday, August 23, 2017 11:03 AM

On my Eduard Hellcat project, I'm trying Doog's multilayer chipping effect, to show chromate as well as bare metal through chipping areas.  So my layers are: stynlrez black primer -> vallejo metal color aluminum -> vallejo chipping medium -> mission models chromate yellow -> future (seals in the first layer of chipping) ->chipping medium -> primer again.  I know that's a lot of layers, but they're all super thin.  First set of chipping went just the way I wanted it to.  Future went on and dried well.  I'm guessing I must not have let the chipping medium dry enough the second time, because I got some crazing in my second layer of primer.  It's only on the areas where I had applied the chipping medium, but not all the areas where I applied it. 

 2017-08-23_09-00-36 

Crazing on the cowling panel and leading edge of port wing.  Similar things on bottom cowling and leading edges of both tailplanes. 

My question for the board is, how to I deal with this crazing now?  Do I try to sand it down? I assume painting over it would be bad.  Could I use the chipping technique to take off the primer in those areas and try again? I'm at a loss, but don't want to mess up my final paint coat so I want to try the right thing first. Thanks in advance for any help you can offer. 

  • Member since
    July, 2013
Posted by modelmaker66 on Wednesday, August 23, 2017 4:29 PM

Why would you use primer a second time? that may be your problem.

  • Member since
    November, 2013
Posted by bstarr3 on Wednesday, August 23, 2017 5:42 PM

Following the technique as outlined at Doog's blog

https://doogsmodels.com/2014/10/09/technique-multi-layer-chipping/amp/

Second primer is for blackbasing. Crazing is only an issue in a couple of places so I think it's due to not letting the chipping medium dry long enough in those spots. The main issue is how to fix it though

  • Member since
    January, 2013
Posted by BlackSheepTwoOneFour on Thursday, August 24, 2017 4:32 PM

Reading the link you provided, he used black paint for blackbasing, not black primer.

  • Member since
    November, 2013
Posted by bstarr3 on Thursday, August 24, 2017 5:15 PM

Excuse my ignorance but how would black paint behave differently than black primer? Again, there is only a problem with the finish in a couple of areas.

I do appreciate the feedback, but does anybody have any advice on how to fix this?

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