... ,6061 6013 6082 3. Any designing, you offer to us,we will do it as possible. 4. Surface finish:mill finish, polish ... ,powder coating,gernal anodizing,electrophoresis . It's mainly up to your preference and requirement. 5. About the optional color ... Sand gold ect! Any color your want,we can try my best to do it. 6. while our products meet your needing, please feel ...