ThanksFrom SPI tech sheet - Buffing: Universal Clear buffs great. Always let it sit overnight before buffing but small spots like a door can be buffed in 2 hours at 75 degrees with normal activator if needed. Adjust buffing times according to your air temperature, activator used, and color used.
Thanks!For UC, most folks here give it several days, with as much time in sunlight as possible.
It's never "too late" to buff UC.