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Pit marks after painting

Posted: Tue Dec 10, 2013 9:24 am
by NAMBiohazard
Hi guys

Can anyone please assist........
This is now my second model that after I airbrushed it , it seems as if the paint is making small holes in the plastic.

I use Humbrol paints with the Humbrol thinners.
When I use Tamiya I dont get this problem but acrilyc paint is hard to come by here in Namibia.

Re: Pit marks after painting

Posted: Tue Dec 10, 2013 11:27 am
by PhildaFish
Could you show us a photograph so we can see what you mean? Is it Humbrol enamel paint you're using?

Re: Pit marks after painting

Posted: Tue Dec 10, 2013 11:42 am
by Daishi12
It sounds to me like you are getting silicon inclusions on the surface of the kit. When you build the kit it may be an idea to cleanse your hands with an alcohol based hand sanitizer and also wash the kit before assembly in soapy water (make sure you rinse with clean water and allow the kit to dry). Also try to get hold of tacky rags which should be available from a car/lorry sprayer and use the tacky rags before and after priming. The other thing you may need to do is make sure that your airbrush is scrupulously cleaned before and after airbrushing. The final thing is assuming that you are using a compressor is to make sure that there is an oil/water trap on the air line, and that that is also scrupulously cleaned.

Hope this helps.

Re: Pit marks after painting

Posted: Tue Dec 10, 2013 12:25 pm
by Lee
Daishi12 wrote:It sounds to me like you are getting silicon inclusions on the surface of the kit. When you build the kit it may be an idea to cleanse your hands with an alcohol based hand sanitizer and also wash the kit before assembly in soapy water (make sure you rinse with clean water and allow the kit to dry). Also try to get hold of tacky rags which should be available from a car/lorry sprayer and use the tacky rags before and after priming. The other thing you may need to do is make sure that your airbrush is scrupulously cleaned before and after airbrushing. The final thing is assuming that you are using a compressor is to make sure that there is an oil/water trap on the air line, and that that is also scrupulously cleaned.

Hope this helps.
All good advice :th:

Is it like an orange peel effect? If so you may be spraying the paint on too thick OR at too high a pressure OR at too low a pressure.

A picture would surely help my friend :D

Re: Pit marks after painting

Posted: Tue Dec 10, 2013 2:10 pm
by NAMBiohazard
Hi guys and thank you for the replies

http://s1254.photobucket.com/user/NAM_B ... 6.jpg.html


and yes it s humbrol enamel

Re: Pit marks after painting

Posted: Tue Dec 10, 2013 2:23 pm
by Paul
That looks like the effect you get from spraying alclad primer at too high a pressure and too far away, could be a similar problem with enamels

Re: Pit marks after painting

Posted: Tue Dec 10, 2013 7:11 pm
by PhildaFish
A point of view from a completely different angle here but it looks like casting marks that some older tanks have in the metalwork... I think it looks good!