Anyone here paint cars as a hobby?

You can use any Omni reducer in place of DT reducers, They are less aggressive but work fine i do it all the time. You can use Omni 167-168 Harder in place of DU hardners the ratio mixing is the same. DCX61 is a totally different mixing ratio. So if you want to use Concept clear or DCC single stage just use the mixing ratio for du hardners. You can also use Omni reducers to thin Epoxy primer to a sealer it levels it out more flat. Omni Epoxy mix ratio is 2-1-1/2 the 1/2 is omni reducer.