Out of the investment the figures showed promise. Washup with the gerni revealed lots of bubble like mess, particularly on the lower half. Maybe the first coat was too thin, or roughly mixed with bubbles.
Breath pipes cut off with thin cutoff wheels in a die grinder. Then clean up by tapping knobs with a screw driver, smaller than a cold chisel, then carbide burrs in the die grinder. Ready to have a go at welding and surface prep.