That looks great, mate.
Just a few 'scratches' should be enough in the weathering department, I reckon.
The main body does look a bit too tidy, so will likely do something
It's a pity that the tyres are so flat though
Yes, rather balloon-like tyres with no tread whatsoever
Would you consider bringing this to BLAM this year?
Possibly, depending how I get on with all the other bits. I don't actually have a specific game/scenario in mind so far, but will need to have a think about that at some time anyway.
Onto the "Gate Bus":
By undoing two screws on the underside, removing a small clip on one side and with a mild amount of brute force, the bus was disassembled:

The seating section was removed by levering it off 3 mounting pillars. I wanted to replace some of the seats with drums of fuel etc (SPOILER: as per the film):

A section was removed and replaced with plastic card:

Space to add drums and other junk:

All the light fittings and side rubbing strips removed for repainting of the body. Very easy to do by trimming the rear of each piece, which had been melted to hold in place:

The main body needs re-spraying, but the weather/time of year isn't particularly good to do so.
