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Shellac topcoat turning out uneven

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Forum topic by HarveyDunn posted 03-26-2014 02:25 PM 795 views 0 times favorited 9 replies Add to Favorites Watch
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HarveyDunn

328 posts in 1195 days


03-26-2014 02:25 PM

I’m putting a shellac topcoat over milk paint. It is drying unevenly – it all looks fine when wet, but when it drys I can see ridges that look like a boundary marking an area where the shellac is thicker than it is in the neighboring area.

Any suggestions as to what I am doing wrong? Also, how to fix it – can I just sand it down and recoat?


9 replies so far

View a1Jim's profile

a1Jim

115202 posts in 3041 days


#1 posted 03-26-2014 02:40 PM

I don’t think milk paint and a alcohol base product is a good match. Shellac is a product that a new coat will melt into a existing coat ,so I would say apply another coat spraying it would be best,sanding is not necessary . If you have sprayed it already and you are not experienced spaying finishes that could be the reason your first coat looks uneven .

-- http://artisticwoodstudio.com Custom furniture

View Fred Hargis's profile

Fred Hargis

3940 posts in 1957 days


#2 posted 03-26-2014 03:36 PM

If you brushed that first coat on I would guess that’s the lap marks between brush strokes. If it’s a small area, you can scrape the excess shellac off with a utility knife blade, using it as a scraper. You could also just take a pad wetted with alcohol and smooth it out (I think). I’ve never tried (or heard of) shellac being applied over milk paint, so I’m unsure what would happen to the paint.

-- Our village hasn't lost it's idiot, he was elected to congress.

View gamygeezer's profile

gamygeezer

166 posts in 1049 days


#3 posted 03-26-2014 05:47 PM

I have had that problem when using angle-cut sash brushes for shellac. The shellac seems to flow towards the pointed tip of the brush and leaves more finish there. You might try “padding” it on, with a balled up wad of lint-free cotton cloth. I find that a much more satisfying finish. A thinner 1lb cut will also flow better, but needs more coats to look right. If you would rather use a brush, get a double tapered china bristle for the best results.

Ken

-- What's a vibrant young guy like me doing in a broken down old body like this?

View CharlesA's profile (online now)

CharlesA

3022 posts in 1262 days


#4 posted 03-26-2014 06:04 PM

What would be the purpose of shellac over paint? Wouldn’t bare paint be more durable? So a hard finish could make sense, perhaps. Maybe I’m just missing something.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

View Clint Searl's profile

Clint Searl

1533 posts in 1825 days


#5 posted 03-26-2014 06:32 PM

Just top the shellac with a couple coats of waterborne poly. It’ll even things out. Then throw away the leftover shellac and never use it again.

-- Clint Searl....Ya can no more do what ya don't know how than ya can git back from where ya ain't been

View HarveyDunn's profile

HarveyDunn

328 posts in 1195 days


#6 posted 03-26-2014 06:59 PM

Thanks everyone.

Charles, the purpose is:
1) deepens color
2) provides protection against fingerprints and waterspots. Not a lot of protection…but just enough for a light use item. Milk paint pretty much has to have a top coat of some sort.

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CharlesA

3022 posts in 1262 days


#7 posted 03-26-2014 07:09 PM

Ok.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

View AlaskaGuy's profile

AlaskaGuy

2406 posts in 1773 days


#8 posted 03-26-2014 07:10 PM

http://www.thebestthings.com/newtools/milk_paint.htm

-- Alaskan's for Global warming!

View CharlesA's profile (online now)

CharlesA

3022 posts in 1262 days


#9 posted 03-26-2014 07:11 PM

Never would have figured that.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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