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Clear coat washing away my wash...

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  • Member since
    August, 2017
Clear coat washing away my wash...
Posted by Eric on Sunday, August 20, 2017 2:09 PM

Hello,

I recently decided to come to scale modeling.  So far its been going well with all the knowledge shared by the community. 

I have an issue for wich i can't find a solution.

I have weathered/washed/shaded a model with oil paints over a future/pledge clear coat.

I'm currently using a paint brush and when I apply a flat clear and it removes the oils...  The first stoke is ok, but when I do other strokes to even out the application, the oils get washed away.

I tried future/pledge with xf-21 and Vellejo flat clear with the same results. I also brushed with water, just to check if it would do the same thing, but its stays there if I dont apply clear.

The last applications of oils where done a week ago, they resist water, so I'm starting to get to the conclusion that applying clear over oils with a paint brush is a big no..

Am I doing something wrong or is its just like that ?

Any tips to it make work with a paint brush would appreciated :)

 

Thanks in advance

 

Eric

  • Member since
    October, 2010
Posted by hypertex on Tuesday, August 22, 2017 10:39 AM

That's unusual, Eric. Water based paints shouldn't remove oil paints. If water by itself does not hurt the oil, I don't know why Vallejo would. Tamiya has alcohol in it, but it still shouldn't remove oil paint.

Personally, this doesn't happen to me, but that's because I don't use a gloss coat. Paint doesn't stick to smooth surfaces as well as it does to rougher (matte) surfaces. So my oils stay put. But, other modelers use future as an undercoat for oils, and they may spray on a flat clear.

Also, keep in mind oil paints take quite a while to dry, much longer than enamels or acrylics. I would think that a week is enough, but maybe not. Maybe try again in another week?

But I think you are better off spraying the clear coat rather than brushing it. If you don't have an airbrush you can use something like Dullcote. Just spray it on in thin layers.

 

  • Member since
    August, 2017
Posted by Eric on Wednesday, August 23, 2017 7:45 PM

Hello hypertex,

Thank you for taking time to reply.

I will give another try this week end, so far I only started on a couple of less visible parts and stopped pretty much right there.

You say you dont use gloss coat, you go strait on the paint or use a less glossy clear like flat/semi gloss ?

 

Thanks

 

Eric

  • Member since
    November, 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Thursday, August 24, 2017 9:36 AM

I find Testors clear coats in the spray can excellent, and that eliminates need to brush anything over the wash.

 

Don Stauffer in Minnesota

  • Member since
    November, 2008
  • From: Florida
Posted by plasticjunkie on Friday, August 25, 2017 11:01 AM

Your problem is that oil paint takes a very long time to dry and cure so it will be dissolved when hand brushing unless it has time to cure for at least a couple of weeks in a well vented area. 

Another way to not disturb the oil paint is to shoot clear flat from a rattle can as Don suggested.

A wash over a gloss coat is good if you want the paint to pool around bolts and sharp details like panel lines. A wash over a flat finish will act more as a filter cuz the open paint pores will draw the paint.

  • Member since
    August, 2017
Posted by Eric on Saturday, August 26, 2017 12:38 PM

Hello,

Thank you for the addtional replys.

I now have quite a few new thing to try out :)

Goal of that model was to try out oils for effects. It will have served well that perpose.

 

Eric

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