I bought a Graco unit for our log cabin.
When we used to brush the finish on it would only last about five years.
Well it's been eleven years now with the sprayed job, and I'll be doing it again this summer. So yes spraying is the way to go.
The Graco is definitely commercial grade and I can recommend it.
However, I didn't realize at the time that you can rent them, rather than buy, which for me would have been cheaper.
Good luck with your project.
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