Started the week by stripping the second steel panel for the rear seat back.  However, the dust produced caused me a major  chest problem, despite the fact I was using a dust mask so I had to stop.  Luckily I needed to go and collect the emergency door glass from Dunmow Glass so I had a chance for a break.  When I returned I set about providing an air supply for my pressurised hood mask, which proved to be very effective despite a leak from the the compressor water drain that required attention.  However  the second and third steel panels now have a coat of primer on the inside face.  Whilst waiting for these to dry, I welded the channel to the vertical of the cab window; this however proved unsuccesful as the welds were unable to penetrate the channel.  Worked stop then in favour of a deep clean of the shed and adjoining workshop.