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SPRAYING ILVA AND GRACO GX 1910/21
I just purchased a new Graco GX 19 and did my first kitchen with it. It seems to be a very good system with good atomization and low overspray, but I am still disappointed as it didn't yet prove to be the answer to my many problems spraying ILVA WB pigmented lac. on vertical surfaces. It either orange peels or it runs.
One thing I should mention is that I switched from the 3M pps/ Accuspray setup I was previously using for all of my finishing which was all done in my shop, which wasn't quite adequate for higher volume finishes. That I could dial in for a good vertical finish, but it was never as repeatable as it seemed it should be, but I am totally new to airless sprayers.
I am using a RAC X FF210 Graco tip, sealing with Zinser All Prime Shellac, and top coating with the ILVA WB.
Any advice or thoughts from anyone who has some good experience spraying ILVA WB with an airless sprayer, especially the Graco GX 19 would be greatly appreciated.
Thanks for your time!
Airless sprayers require a very high fluid pressure in order to completely atomize a liquid. This usually results in a large volume of coating being applied to the surface and orange peel and runs become a problem. You can try turning down the pressure, but at a certain point there will be a reduction in atomization. the next solution would be a smaller size tip. Unfortunately because of the basic mechanics of an airless system it will require precise tuning and adjusting as temperatures/viscosities change. Difficult yes, but can be done.
When you get to a point of considering a new or upgrade purchase I would suggest an air assisted airless system. They require much lower fluid pressure and are much easier to control. For pigmented water base I would recommend at least a 15:1 pump ratio.
Good luck and I hope this is of some help.
ILVA...great prod and as ronb saying.....in Europe they do it a bit different !
You'll have to get back to a max of 2-3mill coats on vertical and make a cross re coat by waiting a little while longer ( say enough so you can see "not touch" visually when it stat to dry, then apply your x-coat.
That's how I do it with my AAA and.....butty !
Thanks for the info guys! I had no email notification on the post so thought it just went unnoticed until I logged into wooden again. Some helpful thoughts and insight here. Anyway, the reason I'm logging in now is to see if anyone else has ever had the same problems with ilva or wb in general regarding rough final coat. What I'm getting is almost like a sandy texture that pops up all over as the coat dries. And also some possibly unrelated minor fish eye or cratering. I'm curious if the wood heat drying the room out under 20 percent humidity may be causing some of my problems. Thanks again!