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Old 06-10-16, 07:25 PM   #11
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Ideal for the seller of slate dressing then

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Old 06-10-16, 07:48 PM   #12
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Dont think i'd trust them with slate, bit fragile. That'd be caustic might get between the layers.



Called fracking Novo!!!!!!





David
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Old 06-10-16, 09:26 PM   #13
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Called fracking Novo!!!!!!





David
Or something very similar.
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Old 07-10-16, 12:44 AM   #14
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If your slate hasn't started to split or de-laminate then the caustic soda dunking treatment might be just the thing. I have cleaned many stone surfaces with caustic soda and the results have been superb - even the slightly porous ones like sandstone.. As for finishing, after the caustic soak, scrub with a nail brush, rinse, scrub again and if necessary repeat the dunking until the surface is spotless. If you are worried about the effects of any remaining alkali (there really shouldn't be any..) then soak the whole thing in a very dilute vinegar solution for a few days and rinse again. When all is ready and thoroughly dry finish the slate with either linseed oil or something similar like Danish oil, work it in well and rub off all the excess. you will have a beautiful finish when you are done.

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Old 07-10-16, 09:26 AM   #15
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I've been looking at the painted surface & i think it may not be paint. Maybe shellac or something it doesnt chip so maybe not shellac. I tried a drop of thinners on a hidden area & it only lightened it slightly.
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Old 09-10-16, 05:56 PM   #16
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Maybe try a drop of caustic soda on the hidden area...

Steve.
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Old 09-10-16, 06:47 PM   #17
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Could have been enamelled, there were quarries in the Corris area of Mid-Wales where the slate is particularly good for worktops and slate tanks, there was a local industry of stove enamelling slate for switchboards and clock cases... If it is, could be an unusual survivor!

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Old 09-10-16, 07:24 PM   #18
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Interesting though Matt.

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Old 09-10-16, 07:45 PM   #19
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Could have been enamelled, there were quarries in the Corris area of Mid-Wales where the slate is particularly good for worktops and slate tanks, there was a local industry of stove enamelling slate for switchboards and clock cases... If it is, could be an unusual survivor!

Matt
That could explain it Matt, The side & one end are radiused & the other two sides are saw cut.
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