If you want multiple gallon of paint, mix them in a 5 gallon pail. The tape should be eliminated quickly after the paint dries. If the tape is stuck from too much paint, you need to use a knife to cut it.
It will not stick nicely to surfaces which would possibly be dusty or have debris, so it is not going to be tremendous sticky. The entire room needs to be wiped down in order that it is clear and dry. You will get better outcomes and a greater likelihood of mess free painting if your paint and tape stick better. All switch plates, outlet covers, and wall covers ought to be taken down. When you exchange the covers, the finish will be good as you shall be able to color easily around outlets and switches.