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| Sanding Sealer before Grain pore Filler http://www-.luthiersforum.com/forum/viewtopic.php?f=10101&t=46064 |
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| Author: | Bill Higgs [ Tue Jul 21, 2015 8:32 pm ] |
| Post subject: | Sanding Sealer before Grain pore Filler |
I used StewMac's clear waterbase grain filler on this batch of 3 guitars. 3 applications/sanding of grain filler and it did not do the job. (Now on coat 38 of Target EM6000. Please don't hurt yourself laughing.) I really like the concept of a clear grain filler and want this to work. Questions: 1. Is there anything wrong with putting a coat of sanding sealer down first before applying the grain filler> 2. What about adding SystemThree Silica Thickener to the grain filler to help fill the pores. VOCly yours, Bill |
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| Author: | Greg B [ Tue Jul 21, 2015 9:50 pm ] |
| Post subject: | Re: Sanding Sealer before Grain pore Filler |
Are you talking about regular sanding sealer or some new water based type? Sanding sealer is meant to provide a quick surface buildup for use under lacquer top coats for use in production furniture (etc). It's not actually meant to fill pores. Typically a couple coats are applied over bare or stained wood, sanded flat, and followed by a couple thin coats of lacquer off the gun. This is meant to save time and materials, and is a lower standard of finish than is expected in guitarmaking. As to you question #1, I'd worry about adhesion issues, since it is basically soap dissolved in lacquer. You could always try it on scrap. AFA #2, I guess you will have to try it. Let us know how it works. I think a lot of people would like to have an alternative to epoxy that is clear. |
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| Author: | B. Howard [ Wed Jul 22, 2015 7:35 am ] |
| Post subject: | Re: Sanding Sealer before Grain pore Filler |
I typically put sealer down before and after the pore filler. |
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| Author: | kencierp [ Wed Jul 22, 2015 8:11 am ] |
| Post subject: | Re: Sanding Sealer before Grain pore Filler |
I did a lot of experimenting with the clear water borne grain fillers --- not for me. But one thing I found that greatly improved the results was to more or less "water proof" the surfaces with a solvent based sealer which actually take a couple of coats. That said, no matter what type of pore filler I use the first step is to seal the wood to trap the oils and resin. I am not a fan of sanding sealer since it is by design a very soft coating so it can be removed/sanded easily -- I am not sure this is a good idea under some top coat products? I use a vinyl sealer. Brian H. does finishing for a living so I'd say he offers some really sound advice and its great that he shares his expertise. |
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| Author: | Greg Maxwell [ Wed Jul 22, 2015 8:13 am ] |
| Post subject: | Re: Sanding Sealer before Grain pore Filler |
I spray vinyl sealer x 2 before pore filling, then sand, then one more sealer. This is over pigmented filler but it gives great results. |
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