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Re - painting over Conversion Varnish

D Brown

What products are available to paint over conversion varnish products . Talking about a kitchen that was painted but now they want to change the color or re paint.
Is there a special primer to get adhesion or do you have to strip the old paint off ?

Thank you

9/20/16       #2: Re - painting over Conversion Varni ...

How long to you plan to be in business?
Are you going to warranty the work for 12 or 24 months?

Lots of problems on 're-do's!

Clean and Prime with MLC Clawlock with fresh catalyst.

Mil thickness is your enemy.

Proceed with caution!

9/20/16       #3: Re - painting over Conversion Varni ...
Leo G

You can put almost anything over the CV finish. If you are putting more catalyzed finish over the top you need to be aware of mil thickness. If you are going for oil or latex all you need to do is a good clean and scuff. 220 grit would work well. Then go over it with a Scotchbrite pad or a Mirlon pad to make sure everything is deglazed.

9/20/16       #4: Re - painting over Conversion Varni ...

I did this today on a kitchen Leo said clean thoroughly. I use Dirtex (ammonia cleaner). Spray on, scrub with a Mirka maroon pad and wipe off.
Mask as necessary
Prime if necessary, I've been using bin pigmented shellac for this application 40 years and it works great, but it is flammable so take the necessary precautions if you use it. This job was very clean so I didn't need to prime...I just sprayed 4 medium to light coats of SW's Kem-Aqua Plus clear tinted to a medium grey right on top of the clean CV and It came out beautiful.

9/21/16       #5: Re - painting over Conversion Varni ...

whoops, I left out a step...after masking I sanded with 320 grit using the little triangle festool sander.

9/22/16       #6: Re - painting over Conversion Varni ...
D Brown

RobertJ , Not sure why you ask " how long to you plan to be in business " ?
I have been in business for close to 40 years . My guess is you were not born yet . Do you know so much that you never ask a question ? How do you learn new things ? regards

9/22/16       #7: Re - painting over Conversion Varni ...

D. Brown,

From your question, " Is their a special primer.....etc," it would appear that you had never done this task before.

If so, I stand corrected.

Most shops warranty their work for 12 months, and many do lifetime.

In forty years you have not re-painted a set of cabinets that have CV on them?

9/22/16       #8: Re - painting over Conversion Varni ...
D Brown

You are correct I have never had to re coat CV painted cabinets . In fact I do not do re paints or refinishing . A friend who owns a shop is having a problem with adhesion on the re paint , thought I'd ask some experts for advice .regards

9/24/16       #9: Re - painting over Conversion Varni ...
DanShafner Member

Problems with intercoat adhesion? One cause might be an insufficient scuff giving your friend's finish a bad mechanical grip on the undercoat.

A thorough 320 grit sanding is usually all that's needed.

Mention was made of dry mil thickness. This is an important consideration. If you need to sand through the color coat because you need to deal with the existing dry mil thickness (so that you don't have a coating weight of over 5 dry mils with the new coatings) then you need to prime over those sand-throughs.

Spot priming prevents the new coating from seeping under the old coating which will cause wrinking. If you wrinkle, sand smooth and spot prime over that.

Clawlock is a great catalyzed primer, and it sands nicely.

You can assume what dry mil thickness you have or you can measure it with a dry mil thickness instrument. I would measure.

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