I will add a little more information soon i promise...
Did i mention i treated the inside of all the tubes with rust killer...then pumped half a tin of Dinitrol inside it
The rear loopstays had no vent holes in them when new and i think moisture trapped in there had to get out somehow!! It didnt take too long on this frame unfortunately.
I think anyone wishing to maintain the integrity of an old steel frame should do something similar.
Frank drilled holes through the bottom bracket shell into the rear loopstays so any moisture can come out and the frame can breath a little. However mines that full of wax oil it will have a job :facepalm:
Also a good idea if anyone on here buys a brand new steel frameset. It is always best to treat the inside of the tubes from day 1 before the frame is built into a bike. The UK is a very, very damp environment and will destroy ferrous metal items!!! I know this from owning classic cars too.
