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 Post subject: Coloring the trim
PostPosted: Dec Mon 09, 2019 1:58 pm 
Member

Joined: Nov Thu 20, 2014 4:52 pm
Posts: 155
Location: St. George, Utah
I got a cabinet back from the refinisher and want to color some of the trim areas. Can I tape off the trim and use paint right over the lacquer?


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 Post subject: Re: Coloring the trim
PostPosted: Dec Tue 10, 2019 9:39 am 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 3462
Location: Nr London, England, SS1 3PT
Its usual to get the refinisher to colour the trim before the lacquer. What did he use for the finish?

Spray painting with acrylic over cellulose, if that was what he used, should be OK but I would wait a while before I did it. Different formulations can fight one and other giving inconsistent shrinkage and tiny cracks then appear.

Ideally it would be good to have a scrap piece of wood, with what ever he used on it, to try as a test piece.

Gary


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 Post subject: Re: Coloring the trim
PostPosted: Dec Tue 10, 2019 10:18 am 
Site Admin

Joined: Jan Thu 01, 1970 1:00 am
Posts: 7411
Location: Baguio City, Philippines
Tape it off, apply a wash coat of shellac on top, then add the color you want.

This does a couple of things :

Prevents the color bleeding under the tape, guarantees a good bond the the lacquer, and eliminates any possible mismatch with the lacquer and the paint you choose.


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 Post subject: Re: Coloring the trim
PostPosted: Dec Tue 10, 2019 1:45 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 3462
Location: Nr London, England, SS1 3PT
Good tip Alan. Like the no paint bleed bit.

Better sort the shellac out though !! Zinser spray leaves a 'lumpy' finish.

Gary


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 Post subject: Re: Coloring the trim
PostPosted: Dec Wed 11, 2019 10:58 am 
Site Admin

Joined: Jan Thu 01, 1970 1:00 am
Posts: 7411
Location: Baguio City, Philippines
I never had that problem, but prefer to use shellac from a can thinned with 4 to 5 parts denatured alcohol. Brushes on like water and dries in minutes.


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 Post subject: Re: Coloring the trim
PostPosted: Dec Thu 12, 2019 12:16 am 
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Joined: Feb Wed 01, 2012 8:21 pm
Posts: 124
Location: Sheridan, Wyoming
Alan, would this technique also work for paint on paint instead of paint on lacquer? I'm thinking about when you want to paint a two-toned cabinet and you want to prevent the second color from bleeding on to the first.

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Bruce

Be the job,
big or small,
do it right,
or not at all.


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 Post subject: Re: Coloring the trim
PostPosted: Dec Thu 12, 2019 1:07 pm 
Site Admin

Joined: Jan Thu 01, 1970 1:00 am
Posts: 7411
Location: Baguio City, Philippines
Yes. The reason it works is that the shellac will bleed under the tape if there are any small gaps while it creates a continuous film over the cabinet and the tape. That way the top layer you add can only break cleanly when you pull off the tape.


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 Post subject: Re: Coloring the trim
PostPosted: Dec Thu 12, 2019 11:44 pm 
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Joined: Feb Wed 01, 2012 8:21 pm
Posts: 124
Location: Sheridan, Wyoming
Thanks Alan! That's good information.

_________________
Bruce

Be the job,
big or small,
do it right,
or not at all.


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