When you go to hang the plane, wrap an old rag or tee shirt around the engine so any oil that drips out will be caught by the cloth. I start by wrapping the rag tight just behind the prop so the oil coming from the front bearing (wrap completely around once so all of the bearing area is covered) won't drip past it, and also around the carb. I usually wrap behind the cylinder to make sure the rag doesn't come loose an and tuck the end of it either under the fuel lines or between the muffler and fuselage to hold the lose end of the rag in place. A rolled up piece of paper towel stuffed into the muffler helps protect that area and soaks up any fuel/oil residue too.

Hogflyer