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nomadiclifeguide

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Reply with quote  #1 
I have applied paraloid to a specimen and its to shiny. The sides and back needed a good strong coat to stabalise the matrix but stupidly I used the same strength on the specimen itself. How best to thin it down without totally removing it?

Thanks

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Reply with quote  #2 
Paraloid dissolves in acetone so a small paintbrush dipped in acetone but not dripping wiped over the acetone will thin it to make it less shiny or remove. Strong solution acts as a glue,
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ophthalmosaur

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Reply with quote  #3 
Another way is to soak a cloth in acetone and rub/wipe the surface of the fossil with it to remove the acetone on the surface. Repeat as necessary.

cheers

Paul

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Reply with quote  #4 
Wouldn't using a cloth be a bit risky. All cloths have fibres, all you need is a fibre to catch on a fragment of fossil to rip it off.
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nomadiclifeguide

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Reply with quote  #5 
I havent managed to do it yet as we are out on our travels at the moment. The specimen in question is an eleganticeras cannon ball nodule from sandsend. It split cleanly, didnt need any prep but went rusty while sat on the work bench (not just the pyrite skin either, the limestone and the ammo's too).
It spent 3 days soaking in coca-cola to remove the rust, and after a good scrub I coated it in paraloid to seal it. Its very stable so I think a cloth might work well.

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