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Spraying varnish

Blog entry by GMman posted 120 days ago 225 reads 0 times favorited 16 comments Add to Favorites

I have a compressor 2 spray guns and I have tried and tried to spray and it always comes out rough I cannot get a nice smooth finish maybe someone can give me a hint how to spray

-- - - Tools are nice to have but you need someone to work them - -

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GMman

288 posts in 178 days


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16 comments so far

View dennis mitchell's profile

dennis mitchell

2931 posts in 795 days


posted 120 days ago

Mix it with lacquer thinner to thin it a bit as much as 50%. I like about 20%. Sand with 320 between coats.

-- http://www.woodsongsfurniture.com

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GMman

288 posts in 178 days


posted 120 days ago

Thanks Dennis I always use water base varnish

-- - - Tools are nice to have but you need someone to work them - -

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GMman

288 posts in 178 days


posted 120 days ago

Maybe I should thin it with water and how far should the spay gun be

-- - - Tools are nice to have but you need someone to work them - -

View bbqking's profile

bbqking

234 posts in 204 days


posted 120 days ago

Dennis is on the money with the proportions and sanding. Sorry but I have never used water base. bbqKing

-- bbqKing, Lawrenceville

View Todd A. Clippinger's profile

Todd A. Clippinger

2535 posts in 580 days


posted 120 days ago

What kind of spray guns are you using? I typically prefer the gravity feed over the siphon feed. The gravity aids the flow of material so you can focus on atomizing the material.

I concur with Dennis on the thinning.

-- Todd A. Clippinger, Montana, http://amcraftsman.com

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Todd A. Clippinger

2535 posts in 580 days


posted 120 days ago

I got diverted while posting and missed important info.

I have sprayed waterbased finish with good success out of my gravity feed gun. I would recommend thinning with distilled water.

-- Todd A. Clippinger, Montana, http://amcraftsman.com

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Todd A. Clippinger

2535 posts in 580 days


posted 120 days ago

It definitely takes some experimenting with the adjustments.

I suppose that I usually run my gun about 10” from the project.

It takes the right combination of liquid volume (needle adjustment), fan adjustment, and air pressure.

-- Todd A. Clippinger, Montana, http://amcraftsman.com

View GMman's profile

GMman

288 posts in 178 days


posted 119 days ago

Thanks Todd air pressure I set my air at 35 to 40 pounds, I have regular spray guns I plan to get a gravity feed one if that don’t wok I will have to stick to my foam brush, if you have looked at my posted projects they are all done with a foam brush

-- - - Tools are nice to have but you need someone to work them - -

View miles125's profile

miles125

920 posts in 486 days


posted 119 days ago

Spraying varnish can be intimidating. You can get a perfect finish one day, and the next day the same set up will produce little pin bubbles or some other annoying defect. Plus you have a long drying time that invites more calamity. Not to mention you need a full body suit to keep the sticky substance out of every body orifice you have! I forgot who said “varnish is a pleasure to brush and a misery to spray”.

-- miles125, Alabama.."Architecture is frozen music""

View Mark Shymanski's profile

Mark Shymanski

498 posts in 193 days


posted 119 days ago

Many years ago I was working on some installed oak bookcases and had the bright idea to spray on the finish. The bookcases looked great but I could not breathe through my nose for days afterwards as the varnish had completely plugged it…I shudder to think how much of that stuff Ibreathed in. Older and wiser now I heartily agree with miles125, cover every speck of you that you do not want varnished….especially mouth and nose!

I had occasion to see the shelves a few weeks ago, they look as good as the day they were put in :-) Spraying can do a wonderful job just be really concious about the overspray.

-- ....next big purchase is wood for the next project, Mark

View Todd A. Clippinger's profile

Todd A. Clippinger

2535 posts in 580 days


posted 119 days ago

I have noticed that the oil and waterbase finishes leave a sticky residue all over my arms. But the solvent lacquer’s overspray will dry in the air and it lands as dust instead. That is another thing I like about the solvent lacquers.

-- Todd A. Clippinger, Montana, http://amcraftsman.com

View matter's profile

matter

178 posts in 250 days


posted 119 days ago

I love gravity feed guns.

The big problem with spraying latex poly is that it dries so much faster than regular poly, and doesn’t “eat” into itself like lacquer. This can cause you to lose some of your gloss because partially dried particles enter your wet finish.

If I happen to be spraying latex poly, I do it first thing in the morning, before the shop gets above 70f. I also cut it 15 to 25% with water.

I have been much happier spraying oil based poly than almost any other finish. It’s just the drying time that keeps it out of my “standard” list. I never have fish eyes or O.P. with it.

-- The only easy wood project is a fire

View bbqking's profile

bbqking

234 posts in 204 days


posted 119 days ago

Another thing you have to watch is humidity. I won’t spray lacquer if it’s above 70-80 %. I have a gauge in my paint room to monitor this. It can trap millions of small air bubbles and cloud. I agree totally with Todd’s take on having the overspray land as dust rather than glue. It’s a lot easier to sweep it up than wipe it off. I use siphon guns. I’m just more comfortable with them. That’s what I’m used to. bbqKing

-- bbqKing, Lawrenceville

View jeanmarc's profile

jeanmarc

1752 posts in 197 days


posted 58 days ago

as tu essayer de passer du fondur avant de passer le verni le fondur permet de boucher les pores du bois ensuite tu ponce avec du papier de verre très fin et tu passe ton verni mais avant tout il faut déjà bien poncer le meuble

-- jeanmarc manosque france

View albut's profile

albut

21 posts in 173 days


posted 47 days ago

salut moi j’ai acheter un fusil a gravite chez princessauto et il vas bien il vienne en special de temps en temps

p.s il y en a plusieur model mais le moin chere a 20$ environ en special n’est pas bon car il y a toujours de l’air qui sort car il n’as pas d’aiguille pour arreter l’air

voici l’adresse www.princessauto.com

View GMman's profile

GMman

288 posts in 178 days


posted 47 days ago

Un plaisir de te revoir sur le site albut oui je connais princessauto il y a un magasin a Moncton NB que je visite souvent le suis aller 2 semaine passer il faut faire attention ils ont beacoup de bonne chose mais ils ont aussi des chose qui vau pas cher mais ils ont des tres bon prix le magasin ai tres gros…bonne journee

-- - - Tools are nice to have but you need someone to work them - -

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