Replies

1. 
   bilyo | Nov 10, 2021 02:59pm | #1

   I have had similar experience with other products. I think the best approach is to seal the stain with a light spray coat of shellac or other compatible product before applying any finish. Rattle cans work well for this.

1. 
   Kurt_Battles | Nov 12, 2021 09:39am | #3

   Shellac must be a miracle cure. I went into Woodcraft and they also recommended Shellac. I was also told you put it on before the stain. Thanks.

1. 
   john_c2 | Nov 12, 2021 10:32am | #4

   Shellac is magical. Be sure to use dewaxed shellac. If it has wax in it, a top coat might not adhere well.

   There are many dewaxed varieties you can mix yourself, but the only premixed I know of is Zinsser Sealcoat.

2. 
   bilyo | Nov 12, 2021 10:33am | #5

   Shellac applied before the stain is for solving a different problem. In your case, you would spray a light coat to "lock" the stain or dye before applying other finishes.
   The brushing action of applying the sanding sealer is part of the problem as the mechanical action tends to move or lift the color and smear it around. Spraying prevents that problem.
   As mentioned by BobR2, an oil based product may also solve the problem. Experiment first.

2. 
   bobr2 | Nov 10, 2021 04:03pm | #2

   I'm no expert but my guess is the analine dye was a water soluble stain and if so, a water based sealer redissolved it. If this is the case, an oil based sealer should prevent the problem.

1. 
   jszens | Nov 12, 2021 03:08pm | #6

   Rob correctly identified the issue.

   The fix for this specific case, and ALL cases where finishes are applied layer by layer is to use a barrier (seal) in between layers. The key in selecting the proper sealant is to understand the solvents involved, and select a sealer with a dissimilar solvent. As long as that procedure is followed there is minimal risk.

   AS ALWAYS, the entire finishing process, including surface prep, should be tested on lumber from the project, where errors can be detected before the actual project is harmed.

3. 
   Kurt_Battles | Nov 12, 2021 09:58pm | #7

   My membership to FW and this forum is a great investment. The advice I get here takes years of mistakes to learn. Test both the cuts and finishes. Thanks.