I put a pinline on the sanded hotcoat (sanded to 220 for the pinline area) just over the edge of the paint I had applied to the foam. The pinline blurred/fuzzed-up on the side where it was over the white of the board, but stayed true over the color when I glossed the board. I used a posca, water based pen- the color was blue. This is the first problem I have had with pinlines in the 30 boards I have done. Any ideas why this happened? Bob Kirby
Howzit Bob, Have hope there is a solution to your problem. Ink pens have a tendency to bleed under the tape. Before you put down the pin line use your finger nail or an ice cream stick to press down the tape. Next as you apply the posca follow ( about 6" behind ) with a hair drier or heat gun to dry the pin line before it can bleed, This should fix the problem. Aloha, Kokua
Kokua, the strange part about this is that the pinline was perfect after the tape was pulled. I didn’t gloss until the next day so I know it was dry. The one side of the pinline (the side toward the white part of the board) fuzzed out to look like an air brush fade job out about 1/8 of an inch. The other side of the pinline remained perfect. Who knows?? Bob
Bob: I’ve had similar pinline problems. Once with paint pen lines I tracked it down to acetone in my glossing brush (didn’t let the brush dry long enough between gloss coats). As I applied the gloss there was enough acetone in the brush to soften the paint pinline and it bleed while the gloss cured in areas that I first applied gloss to. Recently I had a resin pinline do the same as you are describing. What I decided was that I had wiped the rails down with an acetone soaked rag before glossing, trying to be careful not to touch the pinlines. The fumes must have softened the resin because on the outboard side of the pinline in some areas the line bled slightly. Both were “best ever” pinlines BEFORE I screwed them up. Hope this helps. Tom S.
Kokua: That is a good tip! Are you pulling the pen with one hand and holding the dryer in another? or using another set of hands? Thanks. Tom S.
Tom, Thanks. Acetone in the brush could very well be the problem as I did rinse the brush in acetone to get rid of any dust or dirt. Never had this problem before so I guess I’m getting quicker between steps with experience. Quicker isn’t always better. Bob
Faster kicking glosscoat helps including the warm daytime temperature. And dont use cheap paint or reds or solvent based paint. Spend more time pressing down 233 tape. Anybody having problems pulling existing paint up off off foam?
Howzit Tom, yeah ink pen in 1 hand and dryer in the other. It’s a little tricky but not hard to do. Aloha, Kokua
Howzit Bob, Always blow off your glossing brush with air and set aside for 5 min. I actually smell the brush for any acetone odor before using it. One drawback to using Posca pens is the styrene in the gloss resin has a tendency to lift the color of the pinline, that’s why I perfer Zig pens since they’re pigment ink instead of acrylic paint that’s in Posca pens. Pigment ink doesn’t lift off. Also I wash the board with soap and water before I gloss,if I notice any areas that shed the water to fast I hit the spot with acetone then re wash the board.Aloha, Kokua
Kokua: What kind of soap are you using to rinse off before glossing? dishsoap? Great tip, less acetone the better in my book. Tom S.
Howzit Tom, I just use dish washing soap and a scrubber sponge. Aloha, Kokua
i did some sweet red resin pinlines the other day…glossed it today. son of a bitch…it bleed. it wasn’t too bad. i did wipe the board with acetone prior to glossing, so that may be one of the reasons.it could have softened up from the fumes. or there was too much pigment. but i sprayed the pins with a clear acrylic just to be on the safe side and it still bleed. what do you guys sand your pins with before glossing,320, 220? i started with 320 which i think might be the reason it bleed…not enough bite, so it maybe smeared some pigment??? not too sure. i’m going to practice laying out some pins tomorrow, and glassing over them…so i can get it perfected
Resin pins will bleed if you put too much pigment or hardener in them.They will also bleed if they are brushed too thin which will inhibit curing and wax rise.I always paint the pins twice and walk em out like a gloss.I sand with 220 and follow up with scotchbrite.I blow the dust off with an air compressor and wipe the whole board lightly with acetone just before glossing.I learned this system when I was a production glosser doing on the average of ten boards per day (pins and gloss).If you gloss at the right time just after the pins have kicked you don’t have to do any sanding at all (it can get tricky and we aint in a production line are we?)Lastly I must say that I only use Reichold Gloss Resin…pins and gloss.Silmar is just too slow to kick and for that reason it will melt the pins sometimes and cause bleeding.To be fair to Silmar its a fine pruduct for boards with color on the foam covered by glass. R.B.