Hello All I am having a slight problem with my hot coat. I keep getting these dips in the not coat. There are two kinds. One looks like as if someone took drops of water and placed them on the hot coat before it dried. the other kind is small pinholes. Any tips or solutions. What is cuasing this? Thanks Klein
Hello All>>> I am having a slight problem with my hot coat. I keep getting these dips > in the not coat. There are two kinds. One looks like as if someone took > drops of water and placed them on the hot coat before it dried. the other > kind is small pinholes. Any tips or solutions. What is cuasing this?>>> Thanks Klein Sounds like what happens when spray finish is used around unfinished boards. Fish eyes.
Hello All>>> I am having a slight problem with my hot coat. I keep getting these dips > in the not coat. There are two kinds. One looks like as if someone took > drops of water and placed them on the hot coat before it dried. the other > kind is small pinholes. Any tips or solutions. What is cuasing this?>>> Thanks Klein Epoxy or polyester?? I have the same problem, i am now experimenting with additives(surface tension lowering agents) too prevent the problem. When you put the resin on the laminated board its no problem. Only on a sanded board the problem apears. see also http://www.byk-chemie.com/gb/frame.cfm?idx=23 by craters
Hello All>>> I am having a slight problem with my hot coat. I keep getting these dips > in the not coat. There are two kinds. One looks like as if someone took > drops of water and placed them on the hot coat before it dried. the other > kind is small pinholes. Any tips or solutions. What is cuasing this?>>> Thanks Klein Jim hit it on the nose about the dips(fisheyes). As for the pin air, hopefully it’s just air bubbles that were caused by the brush when you applied the hot coat. I get them in my hot coats and they sand out.I baste the bottom before I hot coat, that way I know the pinair doesn’t go to the foam.
Kokua - I’ve seen “basted” mentioned in your posts before and I am clueless as to what it means. Can you help me out?
Kokua - I’ve seen “basted” mentioned in your posts before and I > am clueless as to what it means. Can you help me out? Thanks Guys Im getting a lot of good feedback. I think we might be nearing what might be the problem of the fisheyes. It is polyester resin. I am not using any spray around the unfinished board. I am laminating a laminated board, I dont have any finish resin on it yet. I think the comment about the tension might be close. What is basteing? About the pin holes, maybe I am getting air bubbles in from the strokes…Any suggestions on how to prevent that? Also, what kind of brushes does everyone use? How are you cleaning them. I dont clean mine anymore. I found even acetone or laquer thinner doesnt clean it fully. I scrub it down hard too. Thanks Guys…Im listening! Klein
Thanks Guys Im getting a lot of good feedback. I think we might be nearing > what might be the problem of the fisheyes. It is polyester resin. I am not > using any spray around the unfinished board. I am laminating a laminated > board, I dont have any finish resin on it yet. I think the comment about > the tension might be close. What is basteing? About the pin holes, maybe I > am getting air bubbles in from the strokes…Any suggestions on how to > prevent that? Also, what kind of brushes does everyone use? How are you > cleaning them. I dont clean mine anymore. I found even acetone or laquer > thinner doesnt clean it fully. I scrub it down hard too.>>> Thanks Guys…Im listening! Klein Basting is applying a coat of lam resin to seal any pin air holes.I use a squegee on the bottom and a brush for the rails. Also, by basting the overlap on the bottom there’s less chance of sanding into the weave.It’s a little extra effort but it’s worth it. When it comes to brush cleaning I keep my hotcoating and glossing brushes soaking in clean acetone when not in use. A clean brush is a happy brush.
Basting is applying a coat of lam resin to seal any pin air holes.I use a > squegee on the bottom and a brush for the rails. Also, by basting the > overlap on the bottom there’s less chance of sanding into the weave.It’s a > little extra effort but it’s worth it. When it comes to brush cleaning I > keep my hotcoating and glossing brushes soaking in clean acetone when not > in use. A clean brush is a happy brush… …I baste with a plastic coated card like a playing card.It forces it down into the weave better,and it’s thinner leaving less to weight,ripples,and excessive sanding.FROG EYES are generally started from the blank up. …Did something imcompatible get on your blank?Herb
Thanks Guys Im getting a lot of good feedback. I think we might be nearing > what might be the problem of the fisheyes. It is polyester resin. I am not > using any spray around the unfinished board. I am laminating a laminated > board, I dont have any finish resin on it yet. I think the comment about > the tension might be close. What is basteing? About the pin holes, maybe I > am getting air bubbles in from the strokes…Any suggestions on how to > prevent that? Also, what kind of brushes does everyone use? How are you > cleaning them. I dont clean mine anymore. I found even acetone or laquer > thinner doesnt clean it fully. I scrub it down hard too.>>> Thanks Guys…Im listening! Klein Normaly the resin is pre-formulated. It depands on the use. Its like shell fuel is not the same as Q8 for example. you can mix de resin yourself starting from a non formulated resin. I did a lot of experimentation on the stuff and it works.
Is it possible that you’ve touched the board (maybe holding it down with one hand while sanding with the other) where the spots are occurring? Is your sandpaper clean? Greasy fingerprints have given me problems even where I smooth out the masking tape apron. I wear clean gloves and use new sandpaper for my final sanding. Are you using the same racks that you do repairs on maybe resulting in some leftover wax being tranferred to your new board? Are the pin holes occurring because there is pin air under your lamination? Using a squeegee to force a coat of lam resin into the layup after it goes off may help fill those holes.(“basting” - thanks Kokua!)