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I have to use a rattle can polyurethane...

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Forum topic by Axle505 posted 10-02-2016 01:28 AM 267 views 0 times favorited 4 replies Add to Favorites Watch
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Axle505

136 posts in 297 days


10-02-2016 01:28 AM

...so how do I do this right. I understand and have done runout. Is there a good technique close to using a spray gun. Also I have to do this in the backyard—no spray booth.


4 replies so far

View bbasiaga's profile

bbasiaga

754 posts in 1457 days


#1 posted 10-02-2016 02:11 AM

Choose a day that isn’t windy. Start the spray off the end of the piece, and continue across in one smooth motion. Overlap passes by 50%.

Practice on scraps.

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View DirtyMike's profile

DirtyMike

451 posts in 364 days


#2 posted 10-02-2016 04:23 AM

Cleaning the tip between sprays will help, I used some ace brand last week with no luck though.

View rwyoung's profile

rwyoung

388 posts in 2934 days


#3 posted 10-03-2016 02:53 PM

Get one of the spray cans that has a decent fan shaped spray. Some of the cheap ones do a cone. Some have a tip that produces a fan in the “vertical” orientation. Those tend to work better.

And spend the extra $5 and get one of the gizmos that snap on top of the can and give you a handle and a trigger.

Pick a decent day, temps in the range listed on the can, same for humidity. Low wind and if any wind, to your back. Work in open shade. Start and stop the spray off the piece. Work at a moderate but deliberate speed across the piece. Overlap 50% on the passes. Keep the can path parallel to the surface to be sprayed, don’t arc it far-close-far. Same as for a spraying rig.

Keep handy a rag or brush (foam or bristle depending on solvent for finish) dampened with some thinner just in case you spot a run. You may be able to touch it out before it sets up. Otherwise, let it set up and use a razor blade to scrape it off, scuff sand and apply one more coat (CAREFULLY this time!).

And finally get an extra can of finish and maybe a piece of cardboard and practice first.

-- Don't sweat the petty things and don't pet the sweaty things.

View TheGreatJon's profile

TheGreatJon

295 posts in 696 days


#4 posted 10-03-2016 03:11 PM

^All of that. Except, maybe two extra cans. I’m always surprised at how quickly those cans run out.

-- This is not the signature line you are looking for.

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