
For really nasty stuff it sometimes requires 2 treatments and you need to let the parts dry between applications so the water doesn't dilute the DPD or create a boundary layer. The only thing I've ever seen that requires more than 2 applications is REALLY BAD carbon deposits in exhaust runners.
I don't even hot tank parts anymore because I still had to use Dawn to get off stuff that the hot tank left on. I skip it now and go straight to the good stuff :mrgreen:
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