The stainless peint is a material that, if clean with frequency, is immune to atmospheric agents. As regards the outside, the frequency must be the same with which you clean windows and glass (every 1-4 months); while for the internal cleaning just remove dust with repeated frequency. As for the materials in wood, they need cleaning, every 2-3 months.
To keep the shiny appearance, just a rinse (hot water and soap) and a good drying with a cloth. The degreasing agents acid-free and non-abrasive are recommended once a year or when sprouting signs of rust.
And 'it recommended cleaning with specific products, acid and non-abrasive, at least once a year.
Cleaning is recommended whenever it is considered necessary, with neutral detergents. To avoid that over time the plexglass will dull it is recommended to use the "liquid polish" to revive it.