patchy paint on walls

[Dollarzz]

just moved in to new flat so misses want the place decoratered , so i though might as well give it a bash, any way to cut a long story short,
painted the lounge with a b&q matt emulsion brilliant white but now it
dried it looks like patchy of paint everywhere, i made sure i put a thick coat on then waited for it to set then when over it to smooth it down i have done 3 time over it to get rid of the patches its driving me mad
any way any tips/ideas would be much appreciated by the way wall were already painted with some white emulsion
shawn

 

[king.module]

we're you using a roller,brush or pad?

IMO i find that using a roller is best and for the final coat run in the same direction..... and use good quality paint for the final coat - b&q stuff i find is a bit thin.....

 

[Dollarzz]

yep i was using a roller a harris one , had another go at it, see what happen then might flatten it with a high sand paper 120 or something
thanks 4 ur advice cheers shawn