there are several different "temp ranges" that your paint thinner will come with. Buy the range that fits what you are painting in. thinner that is too "quick" (made for a lower temp than you are spraying in, and will dry too fast) will cause your paint to have a severe orange peel effect, it wont be smooth at all. Thinner that is too slow (made for a higher temp than you are in, will dry too slow), this makes your paint wayyyyy easier to run.
There are also other problems to watch out for, when using pearls or metallics, since a thinner that is too fast or too slow will alter the finished look. Thinner that is too quick will cause your pearls or metallics to lose their effect, because the paticles will not have time to lay down properly.
However, if you use a slightly slower thinner (made for a higher temp than you are in, causing it to dry slower) will allow pearls or metallics more time to lay down, and will actually increase the effect of those particles.. but be careful, because if pearls or metallics run, it is harder to buff it out, and you will always be able to tell where the run was by the different shimmer at that part.
