Noone has mentioned a couple of safety things that are really worth doing.

The first one is almost never done. Paint the tips of your props. All of your props.

White works in almost any light. Red doesn't but works well with white.

It's amazing how knowing where the prop fan is reminds you that there is a spinning prop in front of that engine. It reminds you that there's something there to avoid. With most props, when they're spinning they're invisible. And you're most apt to try and reach through them bacause you've forgotten anything is there. When the fan is visible, you don't have to remember a spinning prop is there.