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spraying varnish topcoat

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Forum topic by SCOTSMAN posted 12-22-2012 01:18 PM 821 views 0 times favorited 4 replies Add to Favorites Watch
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SCOTSMAN

5361 posts in 2239 days


12-22-2012 01:18 PM

Hi I have several compressors including a small USA built dental compressor for at homevisits for invalid work.I have been concentrating on a bit ( small bit) of turning and using a spray can of pressurised varnish which leaves a quick dry finish and looks really nice.I find the spray cans don’t last very long and at about £12 inc reckelsss delivery charge of five pounds anyway I figure on buying a small gun and some quick dry varnish I already have a few artists spray guns the small type and I feel these would be too small for what I need.I figure maybe the nearest thing to what’s in the spray can might be similar to car finish clear coat any help would be apreciated re gun and what spray material to buy or should I just dilute ordinary varnish and spray thet I.E non cellulose white spirit type mix.Alistair

-- excuse my typing as I have a form of parkinsons disease


4 replies so far

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Dan Krager

1567 posts in 888 days


#1 posted 12-22-2012 05:17 PM

A small top feed auto touch-up gun would be my choice. HVLP (high volume low pressure) helps with overspray and gets into corners better.
I really like lacquer because of its ease of use, lack of waste, and repairability. I have found that with a top feeder using lacquer, complete cleanup can be postponed until a long period of inactivity. Big fan of Deft (brushing lacquer) because its the only lacquer available near here. Thin with lacquer thinner or acetone. Dries faster than varnish, but not as fast as the “standard” lacquer.
Have you considered just polishing your turnings? Use wet abrasives up to 600 or better dampened with water to temporarily swell the grain. The heat of sanding dries it out quickly and thoroughly when the final rub is applied with a clean cotton cloth. A bit of wax and you have a durable finish that you can control the gloss.
DanK

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

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tenontim

2131 posts in 2398 days


#2 posted 12-22-2012 05:33 PM

Alistair, if you’re going with the varnish, you might thin it out a little with some mineral spirits or xylene, to make it spray better. I’d also try putting a little Japan dryer to speed up the dry time.

The method of polishing that Dan mentioned would also work good with this finish made into a wiping varnish, by adding 1 part each of pure tung oil, mineral spirits, and varnish as your final coating. You can add as much as 1/2 part Japan dryer, to speed up the dry.

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tamboti

207 posts in 1795 days


#3 posted 12-22-2012 06:28 PM

Alistair I only use lacquer to spray turned pieces if it is needed and furniture I make other wise I use woodoc 10 available from phil irons in england. The woodoc is applied with a piece of old t shirt. Dan is spot on except check with your supplier about white spirits as this in some countries is turpentine for lacquer I use lacquer thinners. A small graity feed spray gun is ample for turned pieces a bigger gun for furniture pices. Regards Tamboti

-- Africa is not for sissies

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a1Jim

112087 posts in 2231 days


#4 posted 12-22-2012 06:43 PM

Hi Alistair Merry Christmas to you and yours.
I’ve been spraying for about 40 years , The two links are for guns that are super buys and they would be great for what you want to use them for. The HF one is on sale a lot for around $20 or less and the little critter gun is great because it just uses Mason jars to spray from so you can just take it off and store the spare material.
I don’t know if you can get these in Scotland or not but if you could they are both good values and easy to use.

http://www.harborfreight.com/high-volume-low-pressure-gravity-feed-spray-gun-66222.html

http://www.amazon.com/Critter-Spray-Products-22032-Siphon/dp/B00006FRPJ

-- http://artisticwoodstudio.com Custom furniture

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