Aaron Goll

Micro Scratches in Varnish

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Typically I am asked by customers to smooth anyway textured areas in varnish. I do this by wet sanding with 1500 micro mesh, then moving to 2400 mirco mesh, before finishing with 0000 steel wool. 

The result is effective as the textured area is now smooth. My concern however is that the micro mesh and steel wool leave small micro scratches in the varnish. They are very small and thin grey lines. 

Is there a way to avoid these scratches in the future? 

 

Thanks!

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We refer to these scratches as "witness marks".  Once you have removed the scratches with micromesh, try rottenenstone and oil,with the grain. Polish with a chamois. Skip the steel wool.

Joe

 

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20 hours ago, Aaron Goll said:

Typically I am asked by customers to smooth anyway textured areas in varnish. I do this by wet sanding with 1500 micro mesh, then moving to 2400 mirco mesh, before finishing with 0000 steel wool. 

The result is effective as the textured area is now smooth. My concern however is that the micro mesh and steel wool leave small micro scratches in the varnish. They are very small and thin grey lines. 

Is there a way to avoid these scratches in the future? 

 

Thanks!

1500 and 2400 Micromesh are quite aggressive and may leave scratches too deep and difficult to remove with sanding only, steel wool for me is out of the question, too aggressive.

Try instead Micromesh 3200 and 4000, or even 8000 if you like : the process is slower and tedious but deep scratches will be avoided.

Final polishing with mineral oil and alcool or french polish is the only effective way that I know for completely eliminate sanding scratches, even if completely eliminate them is a bit paranoid, the first time you clean the violin from rosin dust, micro scratches inevitably will appear........

 

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