Rangers1

Does anyone have an answer? Is panel Accent and wash the same

Hi, new to the hobby and watched a few videos where after painting the modeler washed the entire model. So I bought Tamiya Black and Brown Accent. Is Accent the same as a wash? Should I just use Accent to highlight welds, rivets and around hatches? What is the best method to give an M109 in Vallejo Sand base color a nice weathered look? Thanks for reading