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| Seem to remember a "rule "about finishes http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10101&t=55733 |
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| Author: | Colin North [ Thu Jun 22, 2023 5:59 am ] |
| Post subject: | Seem to remember a "rule "about finishes |
You should't use a hard finish over a soft finish or is it a soft finish over a hard finish? I think it's you should't use a hard finish over a soft finish, but just wanted some confirmation. |
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| Author: | Barry Daniels [ Thu Jun 22, 2023 7:50 am ] |
| Post subject: | Re: Seem to remember a "rule "about finishes |
Don't use hard over soft. |
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| Author: | Ken Nagy [ Thu Jun 22, 2023 7:57 am ] |
| Post subject: | Re: Seem to remember a "rule "about finishes |
Colin, it is fat over lean. The softer, or more oil/less resin varnish will give some over a harder, denser finish. The other way around you can get more cracking. Oil, poly; over shellac. Some people, probably more in the violin world, go for the crackle when going for an antique look. I would think that you wouldn't want it crackle all over though. The ones who do that know what they are doing. |
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| Author: | Clay S. [ Thu Jun 22, 2023 8:58 am ] |
| Post subject: | Re: Seem to remember a "rule "about finishes |
Some violin repair people will apply a thin coat of French polish (hard) over an oil varnish (soft) to improve the look of an old finish. They can get away with this because the oil varnish has fully cured and is "moving" less. It is also possible to apply a - thin - coat of a drying oil finish (soft) on bare wood to intensify the color, allow it to cure for a few weeks and apply a hard finish (e.g. shellac) over top. "Softer" finishes tend to expand and contract more than "hard" finishes, and as Barry and Ken mentioned it is generally not a good idea to put a hard finish over a soft finish. |
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