No but I've always suspected its effects would be those described by heathfield. However I might be wrong as, being a terrible painter, apart from overloading the brush I do tend to keep on messing with every coat and end up in the same boat as heathfield describes (plus paint runs).
For an indoor matt-finish, I have occasionally used just white undercoat - it goes on to give a perfect finish even in my hands. Don't tell anyone please!
Luv O_G's contribution, lol.
SIQ.