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Spraying assembled drawers

9/26/16       
Jeremy

Hi there- wondering about some tips in spraying drawers that are assembled. I used to spray the parts individually with tape covering the joinery, but that made for many pieces to spray and tape and burned up a lot of valuable time. I turned down fluid coming out of gun so I don't get all the runs, but doesn't seem drawers are as smooth as I would like. Also, the tip of the gun keeps getting plugged with over spray since many of the drawers are seven to ten inches deep in a drawer base. The boxes are made out of the leftover wood from other parts of the kitchen making it nice since there is not much waste left at end of job. Depending on the specie of wood, using gf enduro-var or enduro poly and have been putting two coats on. I know gf says to put on three coats, but that seems overkill for a drawer. Any help/suggestions would be helpful in for future spraying. Thanks.

9/26/16       #2: Spraying assembled drawers ...
Mike Member

When i make drawers i cut the back short of the groove so i can slide the bottom in and nail the bottom to the back piece. I use the bottom to hold the drawers square with a couple of tacks in the bottom while the glue dries then remove the bottom to spray. When finished install the bottoms permanently. I also use prefinished ply for the bottoms.

9/26/16       #3: Spraying assembled drawers ...
Jeremy

The idea of taking the bottom out would sure help keep the gun and my face much cleaner. Never thought of trying that. I do apply three coats of finish on doors, face frames, end panels and such since they are exposed, but since they are laying flat I can spray a much thicker film on them. When doing the drawer sides and the gun is toned down so I don't get runs, is two lighter coats this way durable enough. Drawers arent really exposed to the exterior, but spoons and heavier items could ruin them eventually.

9/26/16       #4: Spraying assembled drawers ...
rich c.

Aren't you using an HVLP gun? Why all the bounce back? Turn the air and the fluid down if you have to. If the tip is getting clogged from the bounce back, you are holding the gun WAY TOO CLOSE! That's something I've never encountered, can't imagine how that happens. The bounce back can't be more pressure than what is coming out of the tip.

9/27/16       #5: Spraying assembled drawers ...
Pdub

Spray all of the inside pieces and their top edge's flat, assemble with prefin. bottoms then spray the assembly upside down.

9/27/16       #6: Spraying assembled drawers ...
jonathan mahnken

why arent you just using prefinished ply for the boxes?

9/27/16       #7: Spraying assembled drawers ...
nick

It's safe to say I spray over 1,000 drawer boxes a year (double that is more like it) and getting a off the gun smooth finish is no easy task...getting a off the gun smooth finish with 2 coats of wb...damn near impossible...as any sanding burn through on your first coat will give you some grain raise on your second. This can be alleviated the next day with a little rub-out with 0000 steel wool, 1500 grit wet/dry or white scotch-brite.
Don't get me wrong, I like/prefer finishing drawer boxes with wb as a solvent finish (CV) can out-gas for months in the confines of a drawer box but I always start with a coat of de-waxed shellac...dries quick, sands OK and keeps the grain raise down. I like sanding it with a new fine-grit sponge in the corners and 320/400 on a RO in the flats. Then I spray 2 coats of whatever WB I"m using (SW kem-Aqua at present)I sand with a fine grit sponge between wb coats, once again real focusing on the corners.
I prefer a pot/gun set-up for WB and for clears I use a Sata 1000k with a 1.3 needle/nozzle .
I'd be lying if I said it comes out perfect even after all of that effort as it is not uncommon for me to do a little rub-out in the corners just before the customer picks it up.

9/27/16       #8: Spraying assembled drawers ...
nick

PS; if you're building these thing save yourself some time (as has been mentioned by others) and build them out of pre-finished maple. It's lots easier to finish just the top edge...just brush on a couple of coats Target 2000 (that stuff is magic) keep a wet rag handy to keep the excess off the pre-finished material. Any roughness can be easily be alleviated with a little very fine abrasive the next day.

9/28/16       #9: Spraying assembled drawers ...
Jeremy

thanks for the input guys. I mainly use Blum soft close undercount slides, so it it easy to glue up leftover stock and sand/plane to 5/8" for the drawer parts. This kept my scrap pile to a minimum, but I will look into pre finished ply for the parts because a lot of effort seems to be doing into these boxes to achieve a good finish-more than is necessary I think. I will also work on gun to see how can get less bounce back. Thanks again

9/28/16       #10: Spraying assembled drawers ...
Mastercabman

Why not spray parts BEFORE assembly?
And use 1/4" prefinished plywood for the bottom?
Most cabinets manufacturer are doing it that way

9/28/16       #11: Spraying assembled drawers ...
D Brown

You could use the new clear edge banding material on prefinished plywood and be done.

9/28/16       #12: Spraying assembled drawers ...
Steve

Dried paint piugging the tip is not so much a result of blowback but rather an issue of air pressure drying the material too soon. Leaving the bottom out is convenient but for the commercial users here, they generally get their drawers from drawer box/door specialties so it is fully assembled. Proper distance from the surface should eliminate the clogging. Lastly, using offcuts from to build the drawers begs the question if you are spraying uniform surfaces. Using prefinished maple sides is usually only practical in the commercial environment since the suppliers sell them in case lots; buying them at WW stores is prohibitively expensive.

9/28/16       #13: Spraying assembled drawers ...
jonathan mahnken

gluing up boards to make drawers is a timely investment. How much is your time worth? I would be using pre finished baltic/russian birch ply, or apple ply for you snobs. But If you really want to carry on doing it this way then I would suggest spraying the parts flat. If you are doing butt joint drawers, Roo glue sticks very well to WB lacquer.

9/28/16       #14: Spraying assembled drawers ...
herb johonson

one other point if you dont buy they prefinnished

if you don't have one get a air assisted pump system will cut down overspray a lot reduce your sanding

good luck
herbj

9/28/16       #15: Spraying assembled drawers ...
Bart

Agree with others pre-finished is the way to go. I won't even take a job if they use unfinished drawers or boxes anymore. It's like analog and digital. Get with the times. At least pre finish your scraps after you size them. The price difference between raw and pre finished 1/4" and 3/4" is minimal. BTW the import pre-finish is a NO go.

9/29/16       #16: Spraying assembled drawers ...
Scott

I would agree with Herb, spraying the inside of cabinet boxes and drawer boxes requires an air assisted pump, you can dial the air way down and just lay the finish in place with very little overspray.


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