Official Luthiers Forum! :: View topic - Spot treat w/ Zpoxy and Enduro-Var?

Thanks Ken!

I tried both methods on a test board. Both worked quite well. I leveled with 600 grit, moved up the micromesh grits and buffed out. Once buffed, the drop-filled area with Enduro-Var was undetectable. The CA, on the other hand, was nearly undetectable. At certain angles under low light I was able to see witness lines of the CA. But I doubt anyone else would see these unless I pointed them out. The CA method was faster and less fussy.

But as is the case so often with finishing things didn't go as planned. I ended up sanding through as I was trying to level a couple drop-filled areas. In the end, I decided to respray the back.

Author:	MikeWaz [ Sun Apr 03, 2016 10:30 pm ]
Post subject:	Spot treat w/ Zpoxy and Enduro-Var?
Well...I could have sworn all those pores were filled! I Just finished buffing. The top turned out awesome. The back looks really good too...but...there are a few areas where the grain wasn't 100% filled. 90% filled, but not all the way. I'm wondering if I can spot treat these areas. Basically, I'd scuff sand them, fill and level with zpoxy and reshoot the affected areas with Enduro-Var. Then I'd sand and buff these areas. Thanks for your help!

Author:	MikeWaz [ Mon Apr 04, 2016 12:28 am ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
An update...I was looking over the back again. There aren't just a few but several areas where the grain isn't 100% filled. They are barely perceptible, but at this point, I think I should treat the entire back and not just spots. I think I'll use a ROS to take off the finish. The trick will be leave as much Zpoxy in the pores as possible. Seem like an okay approach?

Author:	kencierp [ Mon Apr 04, 2016 7:20 am ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
I'd drop fill -- which does not require removing any finish. Haven't tried it yet with Enduro, but I see no reason why using the standard procedure of puddling some top coat on a piece of glass, letting it dry to a gel, then drpping it into the voids would not work. Of course you have to let it dry completely before scraping and polishing. Drop fill CA is another option.

Author:	MikeWaz [ Tue Apr 05, 2016 4:44 pm ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
Thanks Ken! I tried both methods on a test board. Both worked quite well. I leveled with 600 grit, moved up the micromesh grits and buffed out. Once buffed, the drop-filled area with Enduro-Var was undetectable. The CA, on the other hand, was nearly undetectable. At certain angles under low light I was able to see witness lines of the CA. But I doubt anyone else would see these unless I pointed them out. The CA method was faster and less fussy. But as is the case so often with finishing things didn't go as planned. I ended up sanding through as I was trying to level a couple drop-filled areas. In the end, I decided to respray the back.

Author:	johnparchem [ Tue Apr 05, 2016 5:05 pm ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
MikeWaz wrote: Thanks Ken! I tried both methods on a test board. Both worked quite well. I leveled with 600 grit, moved up the micromesh grits and buffed out. Once buffed, the drop-filled area with Enduro-Var was undetectable. The CA, on the other hand, was nearly undetectable. At certain angles under low light I was able to see witness lines of the CA. But I doubt anyone else would see these unless I pointed them out. The CA method was faster and less fussy. But as is the case so often with finishing things didn't go as planned. I ended up sanding through as I was trying to level a couple drop-filled areas. In the end, I decided to respray the back. I have no solutions but I feel the pain of a sand through. I have had a horrible time leveling CA as a drop fill, as it is much harder than the finish around it. Try as I might to my fingers the CA always seemed a little high so a touch more sanding ... repeat until sand through of the surrounding areas. I now mostly level a CA spot with a razor blade. When I am very close I hold down a strip of sand paper about the width of the spot fill on the spot with a finger tip and slowly pull the paper through my finger and the fill.

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Author:	kencierp [ Tue Apr 05, 2016 5:21 pm ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
Quote: I now mostly level a CA spot with a razor blade. Dang it! yes of course that is key to a successful drop fill (at least for me) I wish I had mentioned that part of the process.

Author:	Mike OMelia [ Tue Apr 05, 2016 10:14 pm ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
This is what I was referring to when I mentioned getting the surface prepped. Perfectly. EV poorly bonds over cured EV. I've experienced this. I'm not even sure u want to know what I did. But I punted and started over. And it's also why I mentioned getting it on heavy so you have room to sand back.

Author:	Mike OMelia [ Tue Apr 05, 2016 10:15 pm ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
The other side of this is live with it. And move on to next guitar

Author:	MikeWaz [ Wed Apr 06, 2016 12:00 pm ]
Post subject:	Re: Spot treat w/ Zpoxy and Enduro-Var?
Good info in this thread guys. Thanks! In the past when I've pore filled with Zpoxy, I wouldn't sweat it if I sanded through to wood. I'd simply coat with a 50/50 mixture of alcohol and Zpoxy to ensure even color. Moving forward with Eduro-Var, I'll work toward 100% coverage with no sand through to wood.

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