mopar ,
I have been using PPG's Global D-893 Clear over my DBU for 5 years now , and will never go back to PPG's other clears , reasons :
1: No solvent popping ( it will pop if sprayed in a garage with no air movement ) .
2: High Solids ( like all clears = a 2 coat system )
3: Fast dry times with the D884 catalyst .
4: Sands easy
5: Buffs like butter , doesnt get like a piece of marble , after 24-48 hours dry time .
6: Excellent Longevity .
7: Can be Baked in a Heat makeup booth , ( Its true design ) but can be sprayed in a conventional booth with no problems .
8: Sprays nice and lays out nice .