ORIGINAL: Old Fart
If you are going to wait not hours but days or weeks as you say between coats on a multi colour paint scheme in different colours that require masking and can't be bothered rubbing the surface down,be prudent and use a clear adhesion promoter between coats to insure adhesion.
There are no issues with adhesion using this system as explained earlier, so forget about the use of promoter with this stuff. I/we have been spraying a couple of hundred gallons a year of this stuff for the last 20 years or so in business, and have yet to need promoter. Just saying...
Bob