I do not think the HOA will allow me to paint it outright (Ie, brick is same color as grout). I would have to stain brick by brick to darken color and do away with fading of existing 25 year old brick. What is the best product to use for this - ie, a brick stain? I see quite a few products that are sold in Canada but the ones in the US don't really appear on SW and BM websites. Is there a mix I can make?