Yes i have extensif experience with humbrol enamels i do cars and my best results is with a 2/3 paint and 1/3 tamiya thinners spraying with a Badger 150 - 7 with the medium needle , between 1.5 bar to 2 bar pressure depends on what the temp is in your hobby room , and by the way i do make use of a home made spraybooth to get rid of the overspray ...
hope ths will help
Best regards from Sunny South Africa