Try using vinegar.
Water
To effectively cut composite decking, use a saw with a fine-toothed blade designed for cutting wood or composite materials. Measure and mark the cut line accurately before cutting. Make sure to wear appropriate safety gear, such as goggles and a dust mask, and follow the manufacturer's guidelines for cutting composite decking.
To cut composite decking for a precise and clean finish, use a carbide-tipped saw blade with more teeth for smoother cuts. Measure and mark the cut line accurately before cutting. Support the decking properly to prevent splintering. Use a straight edge guide for straight cuts and a jigsaw for curved cuts. Sand the cut edges for a smooth finish.
straight edge, chalk and chalk line string line and spray paint string line, line level and chalk
Some compound words with "chalk" are chalkboard, chalk dust, chalk line, chalk stick.
red chaulk has a red dye in it - it will be there for years. use blue instead. red is good for layout on subfloors, but NEVER on a finished product I have removed some stains from concrete with a pressure washer, but red chalk is a tough one, the best I can do for you is give you this site: * http://www.browns-services.com/decorative_care.php
To toe the line, or toe the chalk line, is to follow orders and do what you are told. In some circumstances people are asked to stand in front of a line (which may or may not be drawn in chalk) with their toes at the line. If people do that, it is an indication of obedience.
A chalk line or chalk box is a tool for marking long, straight lines on relatively flat surfaces, much farther than is practical by hand or with a straightedge.
Chalk lines are to establish a continuous straight line for things like laying tile or setting bricks.
Ants won't cross a chalk line because the powdery texture of chalk disrupts their ability to follow scent trails. Ants rely on pheromones to communicate and navigate, and the chalk interferes with this process, causing them to avoid crossing the line.
pry up old decking then lay new decking down tight and screw or nail with galvanized nails or screws let ends over hang then use chaulk box to pop straight line and cut
it mean's that you do what your told