Yeah, that's what I mean by draining all the liquids - fuel, oil, coolant, whatever. I never did my hoses, so am unsure of what needs draining and what doesn't. Better off asking someone who has done theirs (Y). And the cover would only be shiny if you use high temperature laquer, normally it comes out matte, like mine. But it is easier to do off the car, I had to do mine in situ as it was pretty much siezed on. Just make sure you have a new gasket for when it goes back on, and then run it up to temperature to cure the paint. But yeah, that should look ok (Y)