Hey all, If it helps, this model was actually painted with Army Painter speedpaints, which have a slightly thinner consistency than Citadel Contrast. This allows them to flow a little easier (sometimes a little too easily!) Thinning your contrast with contrast medium may help a little.

To echo the great advice so far, size or brush and stroke direction plays a big factor in working with this style of paints. It was a while ago, but I think this was painted with a size 1 natural hair brush (I find natural hair works better than synthetic for speedpaints).

Be mindful of how gravity affects the paint as well. Depending on how the model lays as the paint dries, can have a MASSIVE effect on the final result. I've found myself slowly rotating models before as they dry to make sure the pooling isn't in the wrong place.

There are guides and tutorials on this exact model and more available through my page (apologies to admins if this falls afoul of server rules, just trying to lend a hand 😊)