Strange things happen after everthing is done

[stouring]

Hi,

My questions is, after i finish my model (polish & wax), everthing seems ok, but few days later my model will become white (kind of dust). Why? The model is inside a clear box & did not touch after all the work is done. With a polish clothes i can clean it, but i would like to know what happen.

Thanks

[bhop73]

I'm not sure i understand exactly, but maybe you're not giving your paint enough time to cure before sticking it in an air-free closed environment. (note I said 'cure' not 'dry')

[vetteconvertible]

On full scale cars, you're supposed to give the paint at least 30 days before you wax it. If you wax it, you're sealing the paint and it may not completely cure, causing it to craze slightly.

It is also possible that there is wax dust in the air in the box you put the model in, which settles on the model after a little time.

[auw12]

my question is what kind of clear you applyed to your model.the case offen happened after clear coated with GUNZE Mr. super clear UV cut(B520) or some similar clear.and if it's too wet when you are spraying the clear your model might go white after that.

[stevenoble]

It's not superglue fumes from the assembly is it? I find that sometimes on resin kits where I have used superglue,usually when it's inside a sealed display box.

[robrex]

Did you use Tamiya modeling wax? If so what did you paint the car with? Tamiya wax is only suitable for lacquer paints.

[stouring]

Thanks all

Let me explain clear.

I have done two models one racing car and one GP bike.

Racing Car making step as follow:
1-Spray entire body with Tamiya can, white color (Drying time one month)
2-Sand & polish wiht Tamiya compound (All 3 compound until shine come out)
3-Decal
4-Spray with clear (Mr. Gunzo UV Cut, Drying time 2 - 3 month)
5-Sand & polish wiht Tamiya compound (All 3 compound until shine come out)
6-Then wax with Tamiya wax
7-Put inside clear box without touching

After one month whole the body become little white without shine. but if i use polish clothes the clean it up will come back the shine.

GP bike making step as follow:
1-Spray entire body with Tamiya can, blue color (Drying time one month)
2-Sand & polish wiht Tamiya compound (All 3 compound until shine come out)
3-Decal
4-Spray with clear (Mr. Gunzo UV Cut, Drying time 2 - 3 month)
5-Sand & polish wiht Tamiya compound (All 3 compound until shine come out)
6-Put inside clear box without touching.

This one still have minor touch up to do, so i did not aplly wax yet. After two days the model become white, also i can clean up with polish clothes.

I don't really know why this happen, and all the problems that mention from you guys don't seems the reason for my case. Can be the weather, cause i am living in Asia humid climate.

Thanks for your advice.

[robrex]

The same thing happened to me when I used the Gunze UV clear. I assumed it was the Tamiya wax! maybe it's the UV clear that is the problem?

Try sitting the body in the sun for a while? I can't read Japanese but perhaps the UV means that sunlight is required to make the paint harden?

[Gamerxz]

UV clear from gunze has got problems.... if the coat is too thick that might happen. The owner of my local hobby shop that carries the gunze clear line , mentioned to me that UV cut clear had problems and he took them all off and never ordered them again . I hadnt had problems with the UV cut clear but maybe its because i only use a light wet layer then use super gloss over it...

[stevenoble]

When I used to work in the auto repair industry certain clearcoats would turn milky.It usually had something to do with the temperature or humidity and we would usually wait till it had dried and re-coat to sort the problem.It may be the UV clear and the humidity that is causing your problems.You could try another type of clearcoat to see if this resolves it.

[proosen]

Originally Posted by robrex

Did you use Tamiya modeling wax? If so what did you paint the car with? Tamiya wax is only suitable for lacquer paints.

That's strange, I had no problems with Tamiya's wax on Humbrol and Modelmaster enamels.
But I usually give them a really long curing time before I even get as far as waxing.


Niclas