Oil based wiping cut of Poly over nitrocellulos lacquer

[Admiral]

I'm finally getting around to trying to fix a table top that had water damage (my bride put some jugs of water on top to prep before a hurricane, and they leaked).

Question is, has anyone put a wiping cut (50-50 oilbased poly and MS) over a nitro finish?  I'm thinking of evening out the flaked portions of the  nitro with acetone, and then hiting it with 400 grit (or OOOO steel wool) to rough it up, then wiping on the cut poly.  Any advice is welcome.

[jteneyck]

I'm finally getting around to trying to fix a table top that had water damage (my bride put some jugs of water on top to prep before a hurricane, and they leaked).

Question is, has anyone put a wiping cut (50-50 oilbased poly and MS) over a nitro finish?  I'm thinking of evening out the flaked portions of the  nitro with acetone, and then hiting it with 400 grit (or OOOO steel wool) to rough it up, then wiping on the cut poly.  Any advice is welcome.

I've never done what you propose, but I'd think about spraying a coat of dewaxed shellac over the lacquer before wiping on the poly mix.  

John

[Admiral]

I've never done what you propose, but I'd think about spraying a coat of dewaxed shellac over the lacquer before wiping on the poly mix.  

John

Thanks, I’ve seen that mentioned in the guitar forums, they deal with nitro a lot.

[Admiral]

I've never done what you propose, but I'd think about spraying a coat of dewaxed shellac over the lacquer before wiping on the poly mix.  

John

John:  To follow up:  I dissolved areas of the cracked nitro on the table top by wiping repeatedly with lacquer thinner to even it out.  It was a slightly tinted finish, and the repaired area was a bit lighter, so I did apply some blonde shellac to darken it up a bit, which worked.  Then rubbed out the existing nitro with OOOO steel wool, and decided to stick with the nitro, so spray can of matte (to match the rest of the table and hutch) and applied three coats.  Then rubbed out the nitro with fine scotchbrite lubed with lightly soapy water.  Came out pretty good, capped it off with a couple of coats of an old can of Behlen paste wax with a carnauba blend.  Came out with a nice matte glow.  Will reinstall top today.

Thanks for your help, made me think.

[jteneyck]

John:  To follow up:  I dissolved areas of the cracked nitro on the table top by wiping repeatedly with lacquer thinner to even it out.  It was a slightly tinted finish, and the repaired area was a bit lighter, so I did apply some blonde shellac to darken it up a bit, which worked.  Then rubbed out the existing nitro with OOOO steel wool, and decided to stick with the nitro, so spray can of matte (to match the rest of the table and hutch) and applied three coats.  Then rubbed out the nitro with fine scotchbrite lubed with lightly soapy water.  Came out pretty good, capped it off with a couple of coats of an old can of Behlen paste wax with a carnauba blend.  Came out with a nice matte glow.  Will reinstall top today.

Thanks for your help, made me think.

Glad you were able to rescue it.  

John