Before you use it the next day, let it warm to room temperature before spraying. After mixing the two parts, you need to thin the mixture according to the manufacturer s recommendation. Using the volume percentages the manufacturer recommends is the best method for thinning polyurethane paint. The other half of the thinning procedure is using the correct size fluid nozzle. In other words, if you thin the mixture correctly and then apply it with the wrong size nozzle, you ll encounter problems.
Improper thinning causes two problems-orange peel and runs.
If the mixture is too thick, the paint is going on in splatters that are not thin enough to flow together, and the painted surface has the same texture as an orange. If the mixture is too thin, it runs and sags. To avoid applying these problems to your airplane, shoot your mixture on a test panel. When preparing your airplane s color coats, make sure your paint has the same batch number because there can be slight color differences between batches. One remedy for different batch numbers is to mix all the cans together in a large container, stir well, and pour them back into their original containers.