Haviland Enterprises, Inc., of Grand Rapids, Mich., offers Stain Drop’s Spot Stain Chalk to instantly remove tough stains from pool and spa surfaces. This single solution quickly removes both metallic and organic stains by simply scrubbing the chalk directly onto the problem area. Safe for all hard surfaces including plaster, vinyl, tile, concrete and fiberglass. Perfect for renovating and repairing stained pool surfaces. Unused chalk can be dried and re-used. Available in a hang-ready retail clamshell packaging with one easyto- handle, three-inch diameter chalk-puck. For more information, contact Haviland Enterprises, Inc., Dept. SI, 421 Ann St. NW, Grand Rapids, MI 49504. Telephone 800-333-0400. Online www. havilandusa.com..