What can I use (that is readily available in the UK) to thin acrylic paints such as those sold by Tamiya.
If I use plain water I find the water miniscus (sp!) causes the paint to bead rather than flow.
For small areas I have had some success with adding a small amount of houshold detergent (washing up liquid) to the water. This breaks up the miniscus and works fine on small areas.
However, I have found that when attempting to cover larger areas (particularly flat ones) the finish is often ruined because the detergent cause bubbles to form in the paint.
Any suggestions welcome.