aloha, long time lurker from maui here. just finishing up my second backyard build and owe most of it to the contributors here at swaylocks. i've scoured the archives for info on putting an epoxy gloss coat over posca pen pinlines, and have found little tidbits of very useful information, but nothing super solid. I do have a few questions for the epoxy or posca guys, but i hope this thread will also serve as info for someone else in search of the same info.
I've read about sealing the tape before laying pins, different methods of painting the pins either resin, india ink, etc., and decided on posca pen for the 'simplicty' and range of colors (i went with metallic gold). i've read a lot of poly guys have had success with the poscas, but on the other hand have read many threads about bleeding after applying a gloss with epoxy. Here is the process I used just now, in preparation for a final epoxy glosscoat in the coming days:
- sand area to be pinlined in direction of lines @ 220grit
- clean area & lay tape
- seal tape with krylon matte clear aerosol
- paint pinline with posca
- pull tape while heatgunning the pinline
- sealed with another very light coat of the clear matte spray
this is what i've done so far (still going to sand the pin real lightly with 320 before glossing) and i'm pretty satisfied at this point, for it being my second board and first attempt at pinlining. just looking for a definitive answer from someone who's tried a similar process i guess? here are some things i am concerned about:
acetone in the matte spray. I've heard about epoxy and acetone not going so well together. im thinking by the time i gloss maybe tomorrow morning or the next morning, the acetone will have evaporated from the ever so light clearcoat i sprayed on. i've read people had success with glossing over posca art after it's been sealed with clear, though im not familiar with the brand they used. Im using krylon matte clear from the aerosol can. I did a little test doodle on a different board, so i'm going to try seeing if the paint bleeds after smearing some resin around on the doodle (i sprayed the doodle with clear, a bit heavy). also bookmarked a thread about doing a quick pull of resin to remove contaminants before glossing with epoxy for a real nice result, so im really gonna jam that resin into the paint with the squeej to see if it affects it at all.
if i were getting paid for this i'd probably redo it..but it looks plenty good enough by my standards for a personal surfboard..in my case, the pinline was to hide the fucked up edge of my fabric inlay and gouges from bad cutlapping (i know its easier to freelap with clear, im just trying to get my timing down pat with the epoxy for cutlaps). without a solid even coat, the imperfections stand out a bit, but only when very close up. im thinking its mostly the metallic hue of the ink that amplifies these imperfections though as higher and low spots are more 'shadowed'. oh well.
it's nowhere near professional but here's the goods so far. it looks more metalic in person but still lost a bit of it's 'shine' or 'flake' after drying and clearcoat: