I failed to do french polishing properly (Full Version)

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Ahmed Flamenco -> I failed to do french polishing properly (Feb. 14 2015 9:45:26)

I tried on remaining pieces of woods the shellac
At first I sanded to 240 grit then applied with a piece of cotton the shellac on the wood in the direction of the grain many times then left it until it dried then sanded it with 1200 grit sanding paper then applied shellac,waiting until it dried then sanding and so on
it did not become glossy
I'm using white shellac that comes in the form of strips not the flakes
the man of the paints shop told me to add some rosin to get it glossy I tried so but the same thing happened.



estebanana -> RE: I failed to do french polishing properly (Feb. 14 2015 11:19:05)

Try putting two or three coats of shellac on your sample. Then sand lightly with 240 sand paper. Then apply more shellac. Do that process about 3 or 4 times and see how it goes. Then you will to see how much shellac you need to make glossy surface. You don't need any resins mixed in the shellac.

Don't worry about it too much, just keep practicing and soon you'll see how it works.



Ahmed Flamenco -> RE: I failed to do french polishing properly (Feb. 14 2015 11:39:39)

ok I'll try but do you think that ratio of shellac to alcohol affect anything?



Stephen Eden -> RE: I failed to do french polishing properly (Feb. 15 2015 11:11:59)

Why not as a test just brush on a thick layer of polish and let it dry. Once dried it should look glossy. you may just need to build up a lot more. One of the more difficult aspects of FP



estebanana -> RE: I failed to do french polishing properly (Feb. 15 2015 13:07:14)

quote:

ok I'll try but do you think that ratio of shellac to alcohol affect anything?


Yes that is important, but French polishing is a thing you learn by doing. So any ratio of shellac to alcohol will eventually build up to surface above the wood.

If you have a 'thin cut' mix it will still build up, only take longer. You can try to make two ratios, one thin and one thicker....and see how they each work.

And when the surface is built up you can add a drop of oil to your pad an see how that works.

If I may ask, just to understand where are your instructions are coming from? The important thing is to keep practicing on scrap pieces of wood.



Andy Culpepper -> RE: I failed to do french polishing properly (Feb. 15 2015 23:23:47)

Yeah just keep putting more on... eventually it has to build up enough that it will get glossy. As Stephen pointed out, the amount of alcohol in it won't matter to the finished product as it's just a way to get the shellac on the wood, and should evaporate leaving only the shellac itself.

For what it's worth I mix my shellac at 2 pounds per gallon (2 pound cut), and then when I go to use it I thin it down to about a 1 1/3 pound cut.



constructordeguitarras -> RE: I failed to do french polishing properly (Feb. 16 2015 5:13:42)

quote:

I failed to do french polishing properly 


That's the best way to learn!

You say you applied it with "cotton." I hope you mean cotton fabric and not cotton wool.

It's not necessary to apply it with the grain.



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