sticky resin pinlines

anyway to dry them up?

they are still tacky 24hrs later

thanks

I assume that you will be glossing over the top so this shouldn’t be a problem !

Steve

Will be glossing, but they need sanding.

They are still very high, and I can smudge them.

Try a hot gun, don’t burn it! Even puting plastic on it can form the barrier needed to help it cure.

If it’s still actually soft and smudgy, you may have to scrape it off, sand and start again, sometimes the quickest and most efficient way in the long run.

Scrape them off and do them over. If you gloss over them they’ll bleed. Use a bit of wax solution in the next batch, Then lightly sand and gloss. Be careful about how much color you put into the resin. Too little and the pin won’t be opaque. Too much and the line will bleed. Pin lining with resin is an art. Using acrylic is much easier.

sounds like too much pigment to resin… the old school trick is to add cobalt. but nowadays cobalt is something that you probably can’t buy. and if you could buy it, it is something you don’t really want to own, very dangerous… you might have to scrape, sand, and acatone scrub…

i use to mix up 3 or more batches of different ratios of pigment and resin…then catalize half of each batch, leaving enough to do the board, and pinline a scrap of board that i taped off… i would time the batches and start doing test pulls on the tape… then i would use the batch that worked the best and peel the tape at the time that was the best… pigment lines = pain in the ass, but are cool when done…

Gregs right, scrape it off and do it over. Next time cook the resin like a 80 /20 percent ratio. I mix my pin resin in a shot glass. About 5 cc of cat to a 1/2 oz shot. You should have enough time to go around the board once, then level it out. It should kick to the peanut butter stage in about 5-7 mins.

The trick to pins is to get them to kick fast. If it’s a slow kick, then the adhesive under the tape starts to melt from the styrene, and thats how you get fuzzy pins. Don’t be shy with the catalyst, its only a cosmetic thing, but if under kicked you’ll pull your hair out waiting for it to dry.

-Jay

…I had this problem…, old pigment is the problem, also sometimes some pigments dont have a polyester base, so this type long last but it isnt good for pinlines…

Pauluk,

One more “old school” trick. Retape the pinline, almost touching the soft pinline. Then shoot a hot mix clear over it, pull the tape and let it cure hard. Sand lightly and do your gloss as normal. If the pinline is too high for your taste, you can wet/dry block sand it and polish it out.

Pinlines can be a pain. Knowing the gell time of your resin is a big advantage. Your supplier should be able to tell you. X mins @ X deg @ X pecent MEKP. Pigment will slow the gell time a bit. I use a 70 / 25 mix of lam resin and neutral spray gelcoat. with 3 % surfacing agent. The gelcoat helps to stop the resin sagging. It is designed to hang on vertical surfaces. Hope this makes sence. platty.

thanks guys!

in the end i sanded of and re applyed.

will remember and try your advise thrailkill if it happens again.

thanks again