This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to paint a steel door
Choose an acrylic paint for your project.
Acrylic paint is more resistant to sunlight exposure than oil-based paint. Additionally, it can be cleaned up with soap and water if spilled.

Pick from: [I] For safety reasons, oil-based paint should be used primarily on steel doors. Acrylic paint is good because it is completely washable.. [II] Tear the pattern template into 2 pieces and place each piece on the coat-on joint on the door you are painting. Scrape off any masking tape showing on the sides of the paint.. [III] Take off all hardware from the steel door. Use a screwdriver or drill to remove the knob and strike plate.. [IV] Brush oil-based paint onto the outside of the metal door by wetting it with water and wiping off as much of the paint as possible. As a result, you won't have to sweep off the paint and apply painter's tape to the exterior..
The answer is:
[III]