What to use to spray a polyurethane coating ?

Question

I'm building an outside bar. I used a famowood glaze coat but it's not meant for outside and not very scratch resisitent-says to use famowood dura-tuff polyurethane coating. It recommends using a natural bristle brush or to spray on. I want to keep the glass like finish from the glazecoat so I don't really want to brush it on. What would be the best sprayer/method for applying this type of sealer? I haven't heard many good things about the wagner power sprayers. It's gonna be a one-time thing so cheap is best. Would a small, cheap, plastic 3 pint garden pump sprayer like this one work? http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100164531&N=10000003+90164&marketID=164&locStoreNum=4907
I've also seen some metal type sprayers that you pressurize with compressed air. I know they work great for stuff like WD40 but don't know how they would work with a polyurethane type sealer. Anyone have any ideas?

Answer 1

Brand names aside...being that the formulations are basically the same industry wide; I'm not familiar with that brand. What I am familiar with are coatings.

First of all if I was doing the job; I'd probably go for a specific EXTERIOR clear coat such as is used at resort type pool side bars.

Second... Poly; as well as other clear coats; is subject to bubbles through agitation. Aerosol methods of application; or AIR driven spray equipment, might aggravate the issue. Unlike Epoxy or Fiberglass clear resin that need a catalyst (Kicker) to create the eventual finish and hardness, POLY doesn't need that; SO in theory at least POLY has a better rate of "Flow Out" in a time frame.

Not at all a fan of ANY Wagner products, I hope you don't choose them. A "HANSEN" Pump sprayer is largely dependant in any consistency; of your ability to keep it pumped up; and the nozzle remaining clear during the process.

I'd suggest TEST first on scrap; but in your case I'd brush the poly, with the best brush you can afford to "waste" allowing NO shedding. It also allows a thicker coating. You may have to apply multiple coats; and use fine steel wool between for air bubbles/popping/ pockets, but if the Poly is any good it will flow as smoothly as if poured.

I personally don't use Poly for exterior work; preferring instead marine grade clear coats; but it's a BAR, and at some point might degrade anyway?

Steven Wolf

Answer 2

Spray On Polyurethane

Answer 3

This Site Might Help You.

RE:
What to use to spray a polyurethane coating ?
I'm building an outside bar. I used a famowood glaze coat but it's not meant for outside and not very scratch resisitent-says to use famowood dura-tuff polyurethane coating. It recommends using a natural bristle brush or to spray on. I want to keep the glass like finish from the glazecoat...

Answer 4

Famowood Glaze Coat

Answer 5

You can buy polyurethane in spray bottles, but I like it bushed on in several coats especially since this is outdoor project. You can get a glass like finish even when brushing. Use good brush and possibly a powerful hair drier to keep it flowing when brushing on
Good Luck

Answer 6

I actually am doing the very same thing right now, andI have put about 5 gallons if glazecoat on top of my bar (sealing bottlecaps in). As you said, the finish is like glass. I bought the Dura-Tuff poly coating and tried to brush it on, but in my opinion, it really added alot of tiny bubbles, and really took away from the glass look. I tried sanding a small portion of the bubbles out, but that looks even worse. I am going to simply get more poly (I'll just get another kind at Lowes, same stuff though) and do a pour like I did for the Glazecoat. I think that will get the look that I, and apparently you, are looking for. But I would suggest you not brush it on.

Answer 7

Mask off one drum to prevent over spray from messing it up. Use a high gloss appliance paint and apply this using several, light applications. This will prevent runs. You can get the proper spray paint at an auto parts business, the kind they sell for automobile touch-ups. This will have a hard, durable finish and made to accept a final clear acrylic. You have the choice to finish with a hi-gloss acrylic spray or a spray on plastic. The plastic can be found at Ace Hardware and the acrylic at a craft store or auto parts store. After this one drum shows itself and there are no problems with the combination of finishes on your paint job, then you can go ahead and finish the others.

Answer 8

1