Saturn yellow is a fluorescent paint that requires a white primer undercoat. Light passes through the transparent yellow then reflects off of the white primer to get the glow. The clear protector will extend the life of this system. If you don't apply the Filterray clear UV protector over the yellow you can expect about two years life. If you use the clear protector you can expect four years or more life.
For two goosneck goal posts we recommend two gallons of #63 White Primer, two gallons of #64 Saturn Yellow and two gallons of the #65 Filterray Clear coat.
We do offer a less expensive alternative. A 100% Acrylic yellow that does not glow and does not need the clear coat.You can expect a couple of years usage, see #66 Goal Post Yellow. We recommend two gallons for two goal posts.