Acylic loves thinner 100% is general and you can go up too 300% if thats what you like ..
personally I like the lesser side with a slower thinner 100%-150% , but don't let it worry you just find what you like ..

As for guns each have there own CFM ratings so each will need a different amount of air delivery from your compressor ..
Go with a gravity feed much easier to paint with - then it's up too you whether you want a hvlp or a conventional high pressure either way will do a great job considering you have plenty of air

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