[QUOTE=crashtech]Low quality clear can be overly sensitive to chemicals, solvents, bird droppings, and environmental fallout. It can lose gloss, get chalky, or even delaminate (peel off).
I agree, Poor quality paints just plain don't have the long term looks and durability of the good quality paints, they just breakdown and fail at a faster rate. If a paint doesn't provide the look and or durability I would expect then that would IMO be considered a poor quality product plain and simple. Price really has nothing to do with the quality of materials IMO. The research and development and brand label are most likely the factors that makes some products more expensive than others. Laquer primer surfacer compared to urethane primer surfacer is a good example of two products designed for the same use that give major differences in performance, basic example. Some of the major things a person will notice when spraying good quality topcoats is there is always very little if any gloss dieback, clarity is good with no haziness, excellent DOI, and very good scratch resistance....lower performance paints just don't provide the same results.