I have 70 meters of fence to paint - 40 metre of picket that is changing colour and previous vendor only did one coat, as well a narrow corrugated metal fence for 30 metres which to specific powder coat is too $$ hence I will paint. Replacing current colourbond which has seen better days. Seeking recommendation of type of spray paint gun to buy IF that is the be most efficient option, or if old fashioned brush will deliver ultimately a better finish. Economy of my time important but it's a lot of fence and needs to look good. Unsure if a roller will work on narrow corrugated. I am a Ryobi owner so if spray is an option anything in that family I would have back up batteries on hand. TIA.

