A DIY paint shaker can save you the time and effort you would normally waste on attempting to mix your spray paint cans before use. The ideal paint shaker is simple to use and extremely portable. If possible, a DIY paint shaker should be made from simple materials you already own. One of the simplest homemade paint shakers is based on a tool that many people already have, the reciprocating saw. The design is so simple, you can create your own in two minutes flat.
Wrap three layers of duct tape around the saw blade. Leave at least 1/4 inch of space between the blade guard and the bottom edge of the tape layer.
Turn on the reciprocal saw and verify that the blade is able to move through its full motion without the tape interfering with the blade's travel.
Tape the spray paint can to one side of the blade. Leave at least 1/2 inch between the bottom of the can and the blade guard. Secure the paint can with at least a double layer of tape wrapped around its centre.
Squeeze the saw trigger gently to start the saw slowly. Verify that the can stays in place and does not interfere with the blade in any way.
Gradually increase the speed and allow the DIY paint shaker to run for at least 20 seconds on full speed. Cut the tape and use the paint.