First of all, we should restore the shape of the object according to the knowledge of standard or plane geometry and solid geometry, then repair it with synthetic resin mud, and finally polish it to make it old, so as to make the whole object harmonious and unified.
For severely corroded ironware, polyacrylate solution and rust on the object can be made into paste, repaired according to the prototype of the ironware, reinforced by dripping water and worn out.