I haven't attempted any oldtimer repairs yet myself, but I've noticed the complete lack of filler in the R4 repairs, unlike for example with this VW Beetle repair:
http://members.chello.nl/h.tillaart/restoroelfoto2.htm
http://members.chello.nl/h.tillaart/restoroelfoto3.htm
http://members.chello.nl/h.tillaart/restoroelfoto5.htm
With this stuff you can cover up quit a bit. Most of the work is creating a perfect steel piece and weld. So the more professional approach is to avoid using it as little as possible?
http://members.chello.nl/h.tillaart/restoroelfoto2.htm
http://members.chello.nl/h.tillaart/restoroelfoto3.htm
http://members.chello.nl/h.tillaart/restoroelfoto5.htm
With this stuff you can cover up quit a bit. Most of the work is creating a perfect steel piece and weld. So the more professional approach is to avoid using it as little as possible?