seamless rusty bumped metal pattern

grunge rusty ferruginous rustle rust mildew pitting corrode corrosion staining oxidation oxidization acidification combustion metallic metal metalline tin-pan brassy ironwork iron bumped oval diamond brilliant adamant rock minikin rhombus lozenge rhomb lattice grille grating grid grill grate floor storey story level stage pair stairs gray blue background texture pattern repeating continuous seamless