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Spraying conversion varnish vertically6/20
What am I missing?! For some reason when I try to spray conversion varnish vertically with my devilbiss it's either too atomized and blotchy or i get orange peel. I've tried every combination from diluting it 5% up to 30%, my air pressure from 10psi up to 25psi, low material feed to high, and fan thin to wide. I'm using Chemcraft pigmented CV. My catalyst and retarder is 4 oz per gallon. I'm in Cali where the temp is usually around 75 to 80 when I spray. Don't get this problem when i spray horizontally.
It's either atomized or it's not. There is no degree of atomized. No idea what "your Devilbiss" means for model and nozzle size. My guess is that you must speed up your arm motion when you go vertically.
I apologize, that was the wrong terminology. I've tried speeding up my arm movement. It is a Devilbiss Finishline FLG4. I'm going back and forth with 1.5 and a 1.8 tip. So if I have good results with a horizontal spray, what would I need to do different when spraying vertically?
That gun needs the 25 PSI, I use one
What wet Mil are you spraying
Thank you Jim. I will definitely try that and keep you posted. Gary, by my last topcoat, I try to keep it around 3 mil. Please keep in mind that I am learning as I go, I been mentored or gone through apprenticeship so when I run into a problem i skower the internet to find information.
We spray almost exclusively vertical. I own several gravity feed guns like your Devilbiss Finishline FLG4, except none are Devilbiss but basically same thing, with 1.4 tips.
However, those guns are used only for small items that are "onesies and twosies" where I only need a pint of paint mixed.
99.9% of the items we spray (whether flat or vertical) get sprayed with an AAA system.
In all honesty I would be mortified of the idea of spraying a whole kitchen with only a gravity feed gun. Or at least, doing that while making money on the project.
If you do a lot of vertical spraying, I highly suggest you look into a decent AAA system, it will give you a faster spray and better lay-down of your material.
If you only do the occasional vertical surface, add more slow thinner or retarder-- but spray thinner coats so that you don't drip it. That's a tricky balance to hit, and I can speak from experience that not all pigmented CV will behave well for you, consistently.