I wouldn't worry very much on gun cleaning if you are going from base to clear, especially with solid colors. Rinse with thinner/reducer and spray through the tip, repeat, load with clear.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy