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Plantation Shutters #6: Using Summit HVLP sprayer for 1st coat of Poly

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Blog entry by Holbs posted 05-24-2017 02:47 AM 1370 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 5: 2 coats of Shellac, 1st coat of Old Masters Dark Walnut on distressed jambs Part 6 of Plantation Shutters series Part 7: Sanded with 400 grit and applied 2nd poly coat for window jambs »

I bought this Summit HVLP sprayer over a year ago (ok..maybe 2) when it was on sale, knowing one day I will jump into the spraying of finishes. I used it for the first time ever today. I’m glad to have purchased this easy no frills HVLP sprayer kit because the upper echelon advanced (Earlex, Fuji, etc) sprayers have a lot of options that are beyond me at this time. It’s only 1 stage and everything made of plastic but it works and is a great introductory device. Longevity is not it’s key selling point, I’m sure :) I sprayed 1 coat of poly, will wait 24 hours then sand with 320 grit (I believe) lightly, then spray 2nd coat.
I started out with water in the cup to learn the spraying cone and how things worked. Maybe mine is defective or it’s how this economical unit works but when you turn it on, nothing comes out (like it should). But after you hold the trigger and let go, some light spray still comes out. Undeterred, I put in 3/4 pint (I am totally unsure how “light” or “heavy” this thing sprays) with a slight mixture of water (about 5-10%). Sprayed top, bottom, and sides of these 4 pieces (was unsure if I had to spray poly on the back of these jambs and bottom of stool since they will be against the window studs but did anyway as I read it’s best to do 100% all around to prevent warping). I think I messed up the first couple seconds of spraying. I did not “prime” the gun with poly so the first couple seconds was mostly water as it looked more “bumpy” than the next 3 pieces I sprayed. Will see how this turns out.
Was unsure what to do with the left over poly in the cup so poured into a clean mason jar (seems I have like 50 laying around).
Wore respirator and goggles, sprayed outside of garage. Next time, I’ll be wearing jeans and long sleeve shirt. And, gotta find a way to suspend the pieces for spraying instead of laying flat.
Unsure how to tell if did good spraying after first coat. The pieces look a tad shiney compared to before (before and after pix below).
Cleaned out cup with soap & water. Sprayed a pint of warm water to clean things out.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter



3 comments so far

View pintodeluxe's profile

pintodeluxe

5421 posts in 2623 days


#1 posted 05-24-2017 03:05 PM

A couple low-angle work lights help a great deal to see the finish as it is being applied. Before I added clip-on lights around the shop, I had no idea what the finish looked like until it dried. Now I can see the texture of the finish as I’m spraying, and adjust flow / speed accordingly.

I prefer to spray workpieces horizontally, as the finish lays out better and there’s less chance of runs or sags.

Have fun!

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View AandCstyle's profile

AandCstyle

2884 posts in 2067 days


#2 posted 05-24-2017 08:58 PM

Holbs, I agree with Willie about horizontal working better so I use painters’ pyramids to keep the work piece off the table. Speaking of which, I have a lazy susan set up so I can rotate the work piece to make it easier to spray all 4 sides. HTH

-- Art

View Holbs's profile

Holbs

1698 posts in 1839 days


#3 posted 05-25-2017 12:13 AM

I was not thinking. I sprayed the top first, waited an hour, flipped upside down to spray other side that will not see the light of day. I should of done the underside first, then flipped over.
Lazy susan…good idea!
Maybe lightly drive some nails into the endgrain to extend upon saw horses. Hmm…of course, maybe I should of assembled the square jambs & stool then sprayed instead of individual pieces.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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