I do Posca and Acrylic pin lines between laminations to protect them from sanding. It's 2 more steps in the process but it's more work when you sand a pinline off too...On the first deck lamination, brush on a 1" seal coat around the lap line and sand with 220 grit along the direction of the pin to create micro grooves along the pinline. When you tape on top of the sanded seal coat the paint won't run under the tape and make a fuzzy pin line. Pull the tape right after laying down the pinline. When the paint dries do the top lamination and seal coat and no chance of sanding it off. This eliminates the need to gloss over the pinline.For resin pinlines mix cab-o-sil in the resin to make it a thick paste and use your finger to lay it between the tape lines. You can do this on top of a sanded seal coat and gloss over. There will be a "bump" of pinline resin that will sand flat when sanding the gloss coat.