I have test fired the rather mature oil burner already, found I needed to build a new wick for the old beastie (glass fibre and stainless steel to replace the cloth and mild steel original parts). The machine is 52+ years old. Most spares became unavailable 30 years ago, I had a copy of a knackered key part handmade from sheet metal 25 years ago in a vehicle prototyping workshop.
Meanwhile I have just condemned a neighbours relatively modern gas boiler - couldn't undo the remains of some screws/bolts (couldn't identify them due to extensive corrosion, there are that bad) to change an O ring.