I am looking to have my dry rock painted purple to look like aquacultured live rock. It is 100lbs and is only 2 pieces so not a bunch of small pieces. It is currently bright white and will be in a fish only system so I do not want to bleach every month. Are branch in shape, anyone that knows what type of paint and has done it before can do these fairly quick. Need someone with experience in doing a do it yourself project similar to this- thanks!!