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Thread: Blotchy Lacquer

  1. #1
    Join Date
    Aug 2009
    Location
    Singapore
    Posts
    0

    Default Blotchy Lacquer

    Hi! I just finished building a cabinet for a subwoofer. I have problems in finishing the cabinet. I have a bubinga veneer on the cabinet. I applied lacquer to it and I have lots of blotchy patches. The picture below show the kind of blotches I have.





    The dull spots are the parts where the lacquer will not stick to. I don't know if this a fish eye problem. The place where i live does not sell fish eye eliminator. Is there any other way to solve this problem ? Should i try a coat of shellac on top of this damaged lacquer coat ?

    Maybe what i have done so far may help in identifying my problem.I shall list what i have done.

    1. I sanded the raw bubinga veneer with 240 grit sandpaper.
    2. I put a coat of wood stain diluted with thinner.
    3. Then i put a few coat of lacquer. ( This coat did not have much blotchy problem).
    4. Then i sanded the fully dried lacquer coat ( abt 1 week of curing) with 360grit sandpaper. Then 600 grit.
    5. After sanding i applied another coat of lacquer. This is when the blotchy spots appear. Spots where the lacquer will not stick to.


    I am in desperate need of help. Any help appreciated. Thank you.

  2. #2
    Join Date
    Jul 2003
    Location
    Melbourne
    Age
    53
    Posts
    1

    Default

    Doesnt look like fish eye to me, how was the veneer glued to substrate?

    I've seen something similar when the glue has leached through the veneer during vacuum pressing.

    If it were me i'd:

    Sand back the finish.
    Wip down all surfaces with prepsol
    apply a coat of shellac
    apply lacquer.

    If your feeling game you could try it without the shellac.

    joez

  3. #3
    Join Date
    Aug 2009
    Location
    Singapore
    Posts
    0

    Default

    Thx for the reply. I have used contact glue to stick the paperbacked veneer on the MDF cabinet. Even water will not pool over those patches.

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