I don't understand why...

There is no doubt a very complex proprietary matrix, they use. Envolving the amount of customers using a specific  color on a particular day, in concert with the number of models purchased by a target demographic, located within the desired parameters of a design required algorithm, which determines the direct ratio of models requiring a particular color and the number of modelers currently buying the type and /or sub type of model as  indicated with the aid of a multiplex of  numbers assigned to a predetermined point in the overall strategy of corporate growth in the next fiscal year.

in other words,  " just  'cause"  

also, the numbers don't always correspond between ModelAir & ModelColor

...

.... so there!

Biggest problem with VJ is their colour names don't correspond with many other paint ranges

I don't think it's just Vallejo brand as a whole. Every hobby paint brand is different when it comes to a certain color, say Olive Drab. You'd be surprised how many different shades of Olive Drab with FS number 34087 there are. It all boils down to which shade of Olive Drab suits you best on the subject you're working on.

Which is why conversion charts between brands are worthless.

I will say this- when I find a paint I like I buy 6 of them. I've got a heck of a lot more unopened bottles of paint than I do wine!

DUSTER

There is no doubt a very complex proprietary matrix, they use. Envolving the amount of customers using a specific  color on a particular day, in concert with the number of models purchased by a target demographic, located within the desired parameters of a design required algorithm, which determines the direct ratio of models requiring a particular color and the number of modelers currently buying the type and /or sub type of model as  indicated with the aid of a multiplex of  numbers assigned to a predetermined point in the overall strategy of corporate growth in the next fiscal year.

in other words,  " just  'cause"  

 

I get the notion of dissimilar results between brands and brand comparison charts.

I don't get why, with same brand, brush paint and air brush types i.e. Vallejo, they don't offer the same color set.

Would you think thinning the Model Air 50:50 to start with would be good?

If I'm not mistaken, Model Air brand can be airbrush straight out of the bottle.

My mistake! It can - I had to buy Model COLOR to get the 2 shades I wanted. So I'll need to thin I'm sure.

I still thin model air at least one third when I am spraying, and model color at least half and half.

Thx I'll try that.

It all hinges on pressure, trigger and distance as well.

I'm sure. I just have no confidence in air brushing at all!

Only one way to gain that confidence is do it. You're not gonna get it unless you try. Start practicing on a scrap kit.

Remember, low pressure, very light spray, build your colors slowly, take your time and have fun.