Five year old crate engine

If the engine was run after assembly and broken in, there will probably be no assembly lube left on anything. I would pull the spark plugs and squirt some oil in each cylinder, pull the valve cover and run oil down to the cam lobes, fill the crankcase with oil, and crank it over with the starter (without ignition) until the oil pressure comes up on a good live gauge. Then install the plugs and fire it up. You can also buy or borrow an electric pre-oiler but I don't think it would be necessary. If you're talking about putting a rattle can paint job on the exhaust manifold, I wouldn't waste my money. Never seen one last. Talk to Leanna on here, she may have a line on what coating will hold up. I've seen what looks like a powder coating on some that held up a long time. There are some ceramic coating that work good too but they're kinda pricey.