when they changed the makeup of dp is when i quit using it. i use SPI products now. the epoxy is outstanding. sands well and is a good build. 72 hr pot life covered. you can save what is left and add it to a new mix the next day , clock starts over. between the dplf and the clears available i was ready to retire. i found spi and have not looked back. the clears buff great and have no die back . i did the 57 vette and waited from dec to march to buff . buffs same as next day almost.
i just got tired of trying to do custom work with products designed for collision work . too much effort and limitations .
this is a site for spi users. it is not part of spi but barry post there .

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a shot of mig gas in the hardener will help save it. it is the moisture that kills it .