So I need to use a paint sprayer? I can't just use a pump sprayer like this... https://www.homedepot.com/p/HDX-2-Gal-Sprayer-1502HDX/207202422?cm_mmc=Shopping%7cBT3%7cG%7c0%7cG-PLA-BT3-HDX-D28I-InsideGarden%7c&gclid=CjwKCAiAjuPRBRBxEiwAeQ2QPmZUb20e9K3UU3BlQaX1ve2bdvaLQ6e9aBWDXCmt3UkfA899Rie5aRoChWcQAvD_BwE&gclsrc=aw.ds&dclid=CLPzy53emNgCFZdANwodEjMJOQ