Please see this image of my gas stove grids, which need to be sandblasted to remove all dark-brown/black hardened dirties, and may be coated with suitable paint for gas cooking. These are cast-iron-type metals. What is the price and how long would it take? Thank you. IMPORTANT NOTE: although I am Hearing Impaired I have good lip-reading skills – although I CANNOT speak on the telephone, I would be grateful if you could correspond directly with me by emailing or smsing with the details (text only). NOTE: no verbal call will be answered, kindly use textual text, please.