Vinyl Matt Emulsion
Hey bartec v,
If the Dulux Matte is product #1200, then you most likely have seriously definable brush marks or as we used to call it, “ropey”. The 1200 line is a mid grade matte finish and if eggshell is applied over it the 1200 will absorb a certain degree of sheen from the eggshell. I would recommend applying a satin over the 1200 and it should turn out as you originally planned to the eggshell sheen. Or to really do it by the book, sand the Dulux using 220 grit to smooth the surface, prime using a good quality oil base enamel undercoater, then apply your eggshell as the finish coat.
Best of Luck
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