What options do I have if I had paid for a "colored" concrete patio color (Dune by Davis) but it shows hardly any color at all? And it is spotty looking. Without tearing up the concrete and having NO sealer applied...what are my options for a permanent solution? Do you know anything about acid treatments for an outdoor patio? Is it true that sealers do not hold up in the Arizona sun long term?? Help! Female homeowner needs your expertise!!