If you already have DP90 on the vehicle , I would recommend staying with PPG .
K-36 will go over the DP90 just fine and give excellent adhesion ( after some scuffing if the DP has sit over 72 hours )
I have used PPG's Deltron DBU system since it came out in the late 80's , it drys quick as it has a reactive reducer ( in 3 different temps ) that kicks to speed up dry times .
PPG also has another Deltron base coat system more people use today its called DBC , it lays flatter but takes a few more minutes to flash , but it does have a hardner that you can use to speed up dry times .
Use the new DC3000 High Velocity Clear , it mixes 4-1 with DCH Catalyst that comes in 3 different temp variables . no Reducer required .

I have painted several friends cars in my garage with DBU & Global clear and have excellent results , just make sure you have good air flow , as if you dont you may get solvent popping from the paint gasses not getting out .

SprayTech