I bought one of those also, but had to replace the wood. I used polyuerethane for use on boats ( Cabots Harbor master) and put on many coats at least 4 and it's held up for 1 full year and still looks good so it may last for quite a while. The metal I would try to mask off the wood and spray paint the metal or brush, either way.The harbor master is clear so you put on whatever color you want under it.

Fin Coat is Waterproof scratch resistant clear coat. Fin coat provides water proofing bacteria free, UV resistant, coating for finishing of wooden furniture (water based PUD with matt & gloss finish).