Hi Pete, I think that is a great idea to leave the chassis paint work as it is....as that adds to the uniqueness of the machine (as well as great for the archives) and will be invaluable if another example of this mystery mower is ever found. Can't wait to see the finished pics, mate.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl