ORIGINAL: NJAIRSTRIKE
I would also recommend a deflector on your mufler it helps with keeping the plane clean and it does a good job. Thats whate I use but You will still have to clean the plane no matter what.
Has anyone tried a silicone tube that connects to the exhaust and extends through the fuselage and exits at the aft? I know this may affect performance a little, maybe a lot, but just wanted to ask. This would keep the fuel almost completely off of the plane.