Hi Alwood, yes mate, the way to go would be to remove the chain case cover, clean the inside of it and take it to a paint shop that can match hammertone finish. The inside of that cover should give them a good sample.
Re: the front roller end caps....originally the 45 had alloy end caps with a brass bush...they wore out also...the reason for the plastic caps most probably would have been price...remember that the SB45 was a "domestic" machine....the SB "industrial" machines all had bearings in the front roller plus a grease nipple. wink
Best of luck with the paint match....
cheers2

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 grin