'Less-is-more' when using Optimum polishes. They seem to have an almost 'oily' consistency, which allows for a longer working time in high temps / direct sunlight and seems to reduce dusting, but can prevent the abrasives from working effectively at the paint surface if too much is used. Very forgiving for novices (like myself) and yet, from what I read here, effective enough for pro users with less time. Great product. 
