I bought a new metal table & chairs for my patio which will have a pergola over it someday. In the mean time can I wax (or something) the table & chairs to slow the rusting that is sure to occur. The table is painted a beautiful dark green. We must irrigate to have any yard at all and they are sure to get some water on them. Also it actually rains here in the form of thunder storms in the summer. Thanks for the help