We bought a home built in 1963. The brick is called norman style and it is gray in color. There were roth iron shutters on the front windows that we removed and now we have dark spots that we want to remove. We have also some water spots and some paint that needs removing too. We also have aluminum trim that needs to be cleaned as it looks dingy too. The landscaping is new and the vinyl windows are new too, so I am afraid to work with any acid cleaners. Can you help.