Good thinking, Gadge.
Ormonoid 500ml Bitumen Paint $10I might get some Killrust on first, let that harden and then put on the bitumen paint.
As to hosing out, maybe I'll have to just be less slack in future. You are right that this is where a 4-stroke is a PITA, because really you can only tip it backwards to about 45 deg and the handle stops it there - it's hard to get under, so you tend not to bother.
