Greetings! I am new to modeling and am having a problem with tiny white speckles appearring when I use Testor Dullcote. I use about a 4:1 dullcote to paint thinner ratio. Could someone please help and tell me what I'm doing wrong? Thanks

Aaron,

Welcome aboard. Are you thinning the dullcote and shooting it through an airbrush? I use it straight from the rattle can and never had that problem. I do know that weather can cause some strange effects with dullcote.

I know this isn't much help but I am confident better answers from people who AB Dullcote are forthcoming.

Shaun

Check the pressure on the compressor, it should be about 15 psi. The thinning ration looks about right. Check the nozzle tip and needle onthe air brush. Are there any hairline cracks or is the needle bent at all?How far away are you from the surface? I shoot mine an inch or less and don't have this problem.

Welcome to the big A Herkledeeks,
I have seen this occur when too thick a coat is laid on.
Remember 2 or 3 thin coats is much better than one thick coat.
I have seen this white speckling occur when the coat is too thick and reacts with the paint - I have also seen it burn some acrylics right off a figure too
I use about a 3:1 ratio as compared to your 4:1 and use very light succesive coats allowing about 20 mins drying time. Having to clean the airbrush each time is annoying - that's why I leave it until I have 6 - 8 figures ready to spray .
Hope this helps,
Andy.

The white spots form when there is too much humidity or dampness. I think you need to vent your area better or wait for better weather and do it outside.

Thank you all. I airbrush using a Pasche single action and have a cheap Testors compressor. Today I have just purchased a pressure valve for it so we'll see how that works. My first assumption was that the air pressure was too high so hopefully the valve will correct that I am going to post a picture of my Jeep that I am finishing, So if you all would be kind and critique it telling what I can improve on anything else I would appreciate it greatly. Thanks again!

Here is my first model. It has some mistakes like too much rust streaking, and the spot on the hood. I have not drybrushed it completely and have not added dirt and rust in other areas or added the windshield. Can you tell me if I am going in the right direction?

Here's one more picture:

definitely headed the right way. You really, really need to do the wheels / tires. They should be painted a gunship gray color and dull coated, then add a weathering to simulate mud, dirt, dust or whatever. Advice on dull coat. get the spray can it works so much better and is easier to use . I use the bottled stuff to touch up small areas

Thank you much for the advice. Are you talking about just the tires or the rims and tires both?

Nice jeep!
One or two things on the white spots:
either moisture from the compresser getting into the line and thus being sprayed out....you need a moisture trap inline on the compresser. The compressor tank should be drained prior to use also.
or....
the flattening agent in the paint isn't being mixed enough when you stir the paint and it is coming out of the gun in small chunks.
Cheers,
C.