You should be alright as long as you are using acryllics, and water them down sufficiantly. But you may run into some uneven coverage issues. Paints specifically formulated for miniature paint have much finer pigment particles than normal acryllic paint, making it easier to thin them for work on a smaller scale.

If you are not wanting to go with Citadel paints I would recommend reaper or vallejo paints. They are more cost effective in my opinion and have a wider range of colors as compared to GW's line.

 

Yeah you can go with any acrylic paint reallly. Since they are sold in larger portions than standard miniture pain you may want to thin them done and make a paint pot at a time so the consistency will be there.

 

Air brush acrylics are pretty good and also have fine pigment particles, they require pretty heavy thinning and plenty of thin even coats but offer some interesting colours, metallic and pearl effects.

As long as you are using a good undercoat most acrylics will work.

 

I've used Delta and Americana paints, and they work quite well. Hell, I've even used "craft paint" (Mostly black) from the dollar store, and found it quite good for fine lines as it was watery... :laugh: