| Official Luthiers Forum! https://www.luthiersforum.com/forum/ |
|
| Finishing problem. Resin pocket? https://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=48043 |
Page 1 of 1 |
| Author: | Colin North [ Tue Jul 19, 2016 3:07 pm ] |
| Post subject: | Finishing problem. Resin pocket? |
Finishing Indian Laurel with Enduro-Var. Sprayed a seal coat of EV over epoxy pore fill and found these "eruptions" in the sides. They follow the grain, and appear in bookedmatched places on the sides. Sanded level, sprayed with further 3 coats EV , and found as pictured after drying but not levelled. Not as much as before, but still not good. Could these be small pitch or resin pockets as I suspect? Any suggestions of how to treat them/seal them off? (I would prefer not to use shellac if possible) |
|
| Author: | Chris Pile [ Tue Jul 19, 2016 3:42 pm ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
How absolutely odd. Looks terrible. Wish I had an answer for you. |
|
| Author: | Colin North [ Tue Jul 19, 2016 4:14 pm ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
Chris Pile wrote: How absolutely odd. Looks terrible. Wish I had an answer for you. They are not all over the sides, only on a couple of places each side. |
|
| Author: | J De Rocher [ Tue Jul 19, 2016 4:20 pm ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
Are they located where you can see the inside surface where those spots are. Anything funky happening on the inside like being concave/sunken? |
|
| Author: | Colin North [ Tue Jul 19, 2016 4:28 pm ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
Difficult to be sure, but there was a split in the sides at or near where the longer area is, which was filled with CA before bending. |
|
| Author: | Alex Kleon [ Tue Jul 19, 2016 6:41 pm ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
Could the epoxy grain fill have had some bubbles that were sanded through, allowing the WB EnduroVar to reach the wood, causing some grain raising? Alex |
|
| Author: | Colin North [ Wed Jul 20, 2016 4:22 am ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
I suppose anything is possible, I believe I only raised the grain on the top during prep. It's getting some thin CA before levelling this time, see how it goes. |
|
| Author: | B. Howard [ Wed Jul 20, 2016 6:24 am ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
Looks like the natural oils welling up through the finish. Especially since you say it appears as a book-match on the other piece. While not as oily and problematic as CocoboloIndian Laurel does is a somewhat oily wood. Water based finishes seem to be more sensitive to this but these oils will cause problems in all types of finishes.... An isolation coat would have prevented this. I would keep filing with EV at this point.... |
|
| Author: | Colin North [ Wed Jul 20, 2016 7:15 am ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
B. Howard wrote: Looks like the natural oils welling up through the finish. Especially since you say it appears as a book-match on the other piece. While not as oily and problematic as CocoboloIndian Laurel does is a somewhat oily wood. Water based finishes seem to be more sensitive to this but these oils will cause problems in all types of finishes.... An isolation coat would have prevented this. I would keep filing with EV at this point.... Thanks. Didn't know this, and there was no indications of oilyness when working the wood and I've had no problems with edges of FBs with EIR and ABW, both oily woods I believe. Any recommendations for an isolating coat I might find in UK? |
|
| Author: | B. Howard [ Thu Jul 21, 2016 6:28 am ] |
| Post subject: | Re: Finishing problem. Resin pocket? |
A quick and cheap iso coat is thin CA. Wipe on a coat and it will lock down the oils. Beware the fumes though as they can be quite wicked when having that much CA off gassing.... Vinyl sealer can be used as well, apply two coats. Cut the first coat with 25% fast evap thinner. The lab guys all recommend this but I have had problems with it on the oiliest woods like Cocobolo Not sure of what all is available on your side of the pond but Cardinal, ICA, Sherwin Williams all have isolators in their products catalog. |
|
| Page 1 of 1 | All times are UTC - 5 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|