I am going to be purchasing Keller shells in sizes 22x14, 12x8 and 14x14. I want them to be black but have visible wood grain and I'm thinking of Miniwax. Does anyone have any suggestions or opinions about it? Also once I apply it I heard you are supposed to sand it and re-stain it and do this process a few times, but also would like tips/advice on this. Lastly, do I need to apply anything after like a sealer or something? Your time and opinions are appreciated.