What is the difference between high build and high solids coatings?

The main difference is that high build refers to the property of a paint (‘can be applied at high thickness’), while high solid refers to the composition of the paint (‘contains less solvents’). read more 

What is the maximum overcoating time?
 
When a freshly applied coating has to be overcoated, it is important to observe minimum and maximum drying and curing times. read more