A couple of useful things

[Pistonsonly]

G'day, needle files.... gas welding tip cleaners, just cut the non serrated (if need be) bit from the end, good sizes for what we need and quite rigid and never wear out. For people in some parts of Aust. Clarke Rubber sell closed cell, sticky backed foam in 3,5 and 9m/m, allows you to  make sanding pads or whatever is needed to suit. Even when wet it hangs together. Some of the automotive paint shops carry open foam pads (for orbital sanders, hook and loop) in fine grits, 2000, 3000& 4000.   More when it comes to mind.   Ken.