I have almost exclusively switched over to Vallejo for main coats. I still have a HUGH stash of Tamiya colors that are used for small areas and cockpits. The problem I was having with the Vallejo coats (and the Tamiya) was that I was scratching off small areas, even with light handling; nicks and such. So I started using Vallejo primers, primarily their 73.601, grey. Seems to have resolved my problems. And like George, I let all coats set for about 24 hours before handling/masking. But I do do a gentle sink wash prior to builds. The paper towels used for drying off are recycled for cleanups.
Why Vallejo? Much easier cleanup (water). Plus dispensing is simpler and will airbrush spray right out of the bottle (usually).