I am far from a chemist or anything like that but using mineral spirits as a thinner is a a thing that I wonder about as for curing and curing time. Mineral spirits is oily and does not tent to dry or evaporate very quickly there fore extending the paint drying time. This is something that I feel will greatly effect the curing time of the paint. Oil base paints tend to take their time curing but on wood they do tent to add the preserving effect of oil to the wood.