43+ Gaianotes Paint Thinner Ratio US. A quick overview and introduction by pro modeller lincoln wright. To add to what projectoxide said, mr color and gaianotes, pure lacquer even if they dry out, can be reactivated with their thinner.
Even when you know the exact ratio, you should mix the thinner in slowly to monitor the results.
Paint thinner is a good but fastidious friend. In short it's going to be a lot of work. I have a 10ml bottle and since i'm using tamiya paints and will be thinned down with gaianotes, i'm going to use a 3:1 ratio. So to start the ball rolling, i mixed a batch of gaianotes lacquer paints to test out, using a dilution ratio of 1:1 with a thinner.