Hi, I've had 4 new internal doors fitted (moulded 4 panel textured finish). I have painted one side of one door with two coats of Dulux Quick Dry Satinwood (brilliant white). Problem is, even after two coats its still quite patchy and looks like it will need at least one more coat. The doors were slightly off white to start with and the Dulux just doesn't seem to cover very well. I've read in other posts that this might not be a very good choice of paint. Would an undercoat help before applying the Dulux Satinwood, if so which undercoat would you guys recommend. Failing that, if I just bite the bullet and start over again which paint would you recommend for a satin finish (Brilliant White). Thanks