advice needed ... wierd effect.

Phil_H wrote:

It looks like your Tamiya paint has been thinned too heavily with water and then applied too heavily so that it has pooled around moulded details. While drying, the paint and water has separated to some extent and (possibly) dissolved minerals (as described above) or components of the paint itself have left "tide rings" or deposits.

hi,thats exactly what it is.i had that with humbrol when i first started back airbrushing last year.

slightly too much thinner and applied too heavily(maybe you had the airbrush too close) so it pools around the mouldings.

its a nice effect when used in the right place.

paul

It looks like your Tamiya paint has been thinned too heavily with water and then applied too heavily so that it has pooled around moulded details. While drying, the paint and water has separated to some extent and (possibly) dissolved minerals (as described above) or components of the paint itself have left "tide rings" or deposits.

I do concur with the others, Use Tamiya thinner, Isopropyl alcohol or as Mike has suggested, Ethyl alcohol. When using either type of alcohol, it may be advantageous to add a drop of acrylic retarder to the mix. 

Water will work to an extent, but it is one of the least favourable options. If you must use water, don't use tapwater - use demineralised or distilled water.

VitG wrote:

I'm using Tamiya acrylics and Tamiya glue. The model was primed before with grey primer (Tamiya:))... I'll let this coat to sit for a few mode hours, then I'll try again.

I use Ethyl alcohol 70% for Tamiya acrylics and have had no problems. 

My :

This looked familiar, then you mentioned Tamiya and I immediately remembered having something similar happen to me, even though I'm stuck with brush painting and rattle cans.

I noticed that sometimes Tamiya flats have had the white particulates ( the same stuff in the additive they make available in the standard paint bottle to allow you do "dull" their gloss colors ) used to give them their flat finish separate on occasion after being applied.  I've had this cause uneven white dusty-looking deposits here and there that look similar to what you seem to have.

I don't know of any "fix" for it in the middle of a project like yours, but the next step on the projects I was working on were ready for gloss coating before decals and the gloss spray cleared up the "dusty" look.

Just asked my wife, if there are colored salts..

There are! Bath salts. I wander if they leave colored resedue. It would be awesome for rusting models.

Boba Fett, It's water!!!

I thinned it with water, and I think I did too much paint in a single coat. I guess it worked a bit like a wash.

I applied a few more light coats and the effect is gone.

But I'll definitely try it on camo. I plan to set the tank up going through muddy terrain in spring time and like it's been through a lot.

I have to experiment some more!

Adding more salt might increase the resedue. 

I'm using Tamiya acrylics and Tamiya glue. The model was primed before with grey primer (Tamiya:))...

I'll let this coat to sit for a few mode hours, then I'll try again.

oleander13 wrote:

What type of paint did you use (enamel or acrylic)?  You might want to spray one more light coat and see if it covers those areas any better before applying your finish coats.  Otherwise you're gonna need to strip the paint and make sure you give her a good washing before applying your primer again. -Mark-

WOW, that is quite an effect.  Nice job (he says tongue in cheek)...

I think, like Mark implies, that it might be helpful to have a little more info.  Type of paint and thinner, was the model primed, and if so, with what?  Stuff like that...

Hi VitG, Welcome back to the hobby!!

Based on the locations where it seems to be showing up, it may be some kind of effect caused by the type of glue you used.  Honestly I've never experienced anything like that, but that's my best educated guess.  Other than that I can only guess it's mold release.

Did you happen to wash your model in soapy water prior to painting?  Sometimes that helps remove any mold release agents (the gunk they use so the sprues come out of the molds - think PAM in the kitchen).

What type of paint did you use (enamel or acrylic)?  You might want to spray one more light coat and see if it covers those areas any better before applying your finish coats.  Otherwise you're gonna need to strip the paint and make sure you give her a good washing before applying your primer again.

-Mark-