Resin Pin mix suggestions

Did some resin pins over a cutlap today, white pin lines over red wine lam.

The pin lines came out ok, but some sections seem a tad thin/watery and the red wine lam colour can be seen through the pin line.

Used a hot filler/hotcoat resin mix with white pigment … wondered if I could have added something to thicken the mix? Some microfibres??

And suggestions?