Quote:

The 7 day window has to do with the ability of the top coat to have a chemical bond to the DPLF.After the 7 days you must scuff and then it is a mechanical bond.

Thats 100% the way i read it on the P Sheet for both the LF and the old non lf. Thing is the sheet says to coat after scuff with more DPLF like the 2K would not work.