As indicated by the drawing the open end tube is modified on a lathe. However would it be possible to have the tubes first coated with ‘hot dip galvanizing / zinc’ and then have the ‘10 mm length - ID 98mm’ removed on a lathe? We intend to weld a third party component to this section. (Would hot dip galvanizing result into any deformations [roundness] of the tube? Bottom is less important.)