Spray paint it with any high temp paint. Should be fine if it is clean. It will be tough to match the existing stuff so I would plan to paint the whole thing. Lay out a tarp to protect the roof from overspray.
In my area, if the chimney pipe extends more than 5' above the roof penetration then you need the barce installed. I went with 4 feet to allow easy sweeping and so I wouldn't need the brace.
In my area, if the chimney pipe extends more than 5' above the roof penetration then you need the barce installed. I went with 4 feet to allow easy sweeping and so I wouldn't need the brace.