OK, probably not quite 6mm, but still modelling (dont know where to post).

I got myself a airbrush from GW, but sick of using the cans. Any ideas if it is possible to buy a electric pressure pumps used by other air brush and connect the GW air brush to?

Does these pressure pumps usually cost around £50+?

A compressor is highly recommended, especially as it allows you to waste air learning to use the airbrush.

With just a little practice, airbrushes can do a modicum of block-painting on 10mm figures, and good camo on 6mm vehicles.

Hi,
A compressor is absolutely essential for airbrushing IMO.  Cost wise, it will pay for itself very quickly - you will actually save money by buying one.  What's more is that you will get consistent pressure all the time, unlike with the cans in where the pressure falls with use.  

As for specifics, I don't know what coupler the GW brush uses, but most manufacturers will sell adapters for different brands.

Whatever you do, try looking for these online once you have settled on a brand.  Model supply stores sometimes aren't the best place to look, so also try art supply stores.  My favorite brand is Iwata.  They have some good quality entry level models.  

Try www.dickblick.com  They often have sales to make the compressors more affordable.

Hope this helps,

CF

If you don't have much money, there is a cheaper option too.  You connect an old car tyre inner tube to a regulator and use the air in it to spray.  If you go to a good hobby store they should have an adapter for this.  

Compressor is better though

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Fire bad, tree pretty - Buffy

I don't think I have any old spare tyres lying around.

Thanks for the info. I've actually found iwata web site for uk. Just need to decide if its worth spending the money now.

I've had a reasonable airbrush setup for 6-7 years, and I've never used it on Epic stuff.  Don't know if that helps your deliberation or not, but thought I'd throw it in.

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Fire bad, tree pretty - Buffy

Well I only recently tried using airbrush because GW released one and it was reasonable price compared to the professional ones in art shops (also didnt get it direct from GW).

But I used it for scenary and especially usefull when painting erm... "that packing material that melts under spray paint". Especially massive mountains and the likes.

An airbrush is useful for Epic and microarmor work. I've painted the basecoats on pretty much all my Tau vehicles (~100 pieces) and a similar number of other models with an Iwata single-action brush. I've only used canned air and yes -- canned air is rubbish. However, I don't have the space and facilities for a compressor.

An airbrush gives you very smooth and thin surfaces. I've mostly used Vallejo Model Air paints.