Harbor freight spray gun?

gliderider06 said

I have used a few of them. They are good if you don't mind orange peel in final finish, or use them for primer and small jobs.

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I painted 2 cars with them and got orange peel on both. Are you saying it could be the gun? They both looked good until they started to dry and a day or two later it was quite obvious. I was assuming the prep was not done well enough.