[chaos paul]

yeah,as previosly said,the mold lines need to go.apart from that,the yellow your using,what one is it,im asuming your using the GW paints,if so you should be using sunburst yellow,as far as i know thats the proper imperial fists colour.apart from that,an undercoat of white instead of black to make the yellow pop,and multiple layers of thinned down yellow instead of 1 or 2 layers of thick paint should help get a good texture,yellow is a hard colour to get right first time,so practise a bit more on some spare models till you get the look just right.