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    10/27 spray finishing class

    This morning myself and 6 other NCWWers gathered at the home of Willemjm for an introduction to spray finishing. Myself and several others had never touched a spray gun. Others had a little experience and one brought along some samples for advice and repair.

    First, on behalf of the students, let me thank Willem! Besides giving us some great info, he was a gracious host. And also hats-off to his wife and thanks for a tasty lasagna lunch that really hit the spot!

    Next (but not last), some pictures to prove it happened:















    I must apologize...because while the above pictures do capture the meat of the day, I missed out on pictures that you all would have wanted to see even more. I should have had the camera out when we got a tour of the furniture that Willem and his father have built. Any description I could give would not do them justice...so I won't bother. I'll only say that there are many examples of fine woodworking in that house...and I'm glad he didn't enter any of them in the furniture category of the calendar contest!
    Turning beautiful wood into scraps...one board at a time.

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    Re: 10/27 spray finishing class

    Finally, I though I'd add the notes that I took during the class. These are just the tidbits that I remembered to write down.

    The class focused exclusively on HVLP guns.

    Basic process
    1. no separate seal coat in many cases
    2. sand to 220
    3. spray N coats (4-6?)
    4. rub out with 3M automotive rubbing compounds


    general comments

    • Experience with a Deft water-borne finish on the kitchen table was not pleasant...would not recommend
    • Target and General Finishes: thumbs up
    • Deft Brushing Lacquer is VERY easy to spray


    Spraying water-base:
    • It will flow
    • may not look great at first...be patient...let it dry before judging!


    Shellac more difficult to spray

    Spraying too little media will leave a sandpaper-like feel. Orange-peel and runs indicate spraying too much media. Too little is better than too much - particularly with solvent-based finishes since subsequent coats will meld with the first.

    1.3mm tip good for water-base
    1.5mm tip for unthinned solvent lacquer
    (for WWing, typically use the smallest tip that came with the gun)

    HVLP pressure recommended for his DeVilbiss gun: 40 PSI from the tank, 23 at the gun WHILE SPRAYING.

    At full spread, these guns can go to 13 CFM - too much for most of our compressors. At a smaller spread, it will be much less...but will still be hard for a small portable compressor to keep up.

    Should use a larger hose (at least 1/2" ID) and high-flow fittings.
    Turning beautiful wood into scraps...one board at a time.

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    Re: 10/27 spray finishing class

    And a few more items:

    One of the most valuable parts of the demonstration (perhaps second only to the actual spraying) was the demonstration of the use of disposable media cups and the ease of cleanup. Cleanup was one of the things I worried about with spray finishing, but this method results in about the same amount of cleanup as I have when applying shellac with a brush (which is really easy...takes me about a minute or so).


    Phil - what model spray gun did you bring to the class?
    Turning beautiful wood into scraps...one board at a time.

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    Re: 10/27 spray finishing class

    Thank you very much to Willem for inviting us into his shop and his home! The spray class was very informative and I feel like I got a lot out of it.

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    Re: 10/27 spray finishing class

    Quote Originally Posted by merrill77 View Post
    And a few more items:

    One of the most valuable parts of the demonstration (perhaps second only to the actual spraying) was the demonstration of the use of disposable media cups and the ease of cleanup. Cleanup was one of the things I worried about with spray finishing, but this method results in about the same amount of cleanup as I have when applying shellac with a brush (which is really easy...takes me about a minute or so).


    Phil - what model spray gun did you bring to the class?
    First - Thank you Willem and Heidi. Your training was great, the food was excellent and the tour of what you have made was inspirational.

    The spray gun that I brought was the Devilbus Finishline 4. Just a newer model of the Finishline 3 that Willem was using. It can be purchased from many sources on the internet, one of them had it with three tips and the disposable Dekups for around $175.

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    Re: 10/27 spray finishing class

    What a great morning! It was a pleasure to meet with other woodworking enthusiasts. We learned, or re-learned the basics of spraying, from someone who really knows it. Willem said spraying is really easy. At least it is when you can get the right practical tips. Willem showed us how to set up a compressor and the gun, how to judge the finish we are getting , and what to do to correct our technique.
    Thank you Willem for your patience. And thank you Heidi for your hospitality and a great lunch.

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  8. #7
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    Re: 10/27 spray finishing class

    As one of the participants in this class, I too would like to extend my thanks to Willem for his time and his outstanding instruction! It was a wonderful learning experience and a great time. Thanks also to Heidi for her efforts in preparing a truly wonderful lunch and for being such a gracious hostess!

    Chris (ChrisM) thanks for posting your notes, since I did not think to bring pencil and paper I appreciate your willingness to share.

    Donn
    DRW

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    Re: 10/27 spray finishing class

    Thanks for all the complements, we had a blast, a day with fellow woodworkers is always fun.

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    Re: 10/27 spray finishing class

    After Willem's training class, I finally had time to try more spraying on my kitchen cabinets. What a huge difference! With a little better understanding of the basics, I got a much better result. Thanks again Willem for taking the time to share your expertise with us.

  11. #10
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    Re: 10/27 spray finishing class

    Quote Originally Posted by Tim Sherwood View Post
    After Willem's training class, I finally had time to try more spraying on my kitchen cabinets. What a huge difference! With a little better understanding of the basics, I got a much better result. Thanks again Willem for taking the time to share your expertise with us.
    Was good meeting you guys, actually I am also spraying today, bar stools, outside in the cold and the wind, but the finish is going on perfectly. Just cussing the glue marks I seem to have missed during sanding.

  12. #11
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    Re: 10/27 spray finishing class

    Tim, glad to hear that the spraying is going well...just goes to show the value of a good educational experience!

    Donn
    DRW

  13. #12
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    Re: 10/27 spray finishing class

    Thought the folks at the class were going to spray my bar stools, gues we ran out of time?

    They are done, this is how I spray Lacquer indoors, two fans under my garage door, lots of open windows behind me a good mask and good lighting. The overspray from a HVLP gun turns into powder before it hits the door, floor and fans and is just vacuumed up after the job is done. With the right gun setting there is almost no overspray.


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