Thank you for the suggestion re the tape BUT being transparent it would not cover any remedial work I do unless I respray the whole tailgate. There is also the problem of colour match even on a respray, which would stand out like a sore thumb.
Chip and scratch? do not seem to do remedial ( Rust) work.
The nub of the problem is a thin line of rust along the bottom edge of the tailgate and although I can treat the rust, if I touch it in using an aerosol there will be a hard line. Even touching in with a fine brush would still be visible. These days, modern paints do not take to cutting in so, the idea of using a covering strip would be the answer. What ever I do will have to be a reasonable job as dealers would try and knock the price down if a job like this is not halfways proficiently done.
Aliexpress, offer two finishers for the tailgate. One is as said, to replace the black finisher under the rear window and they also sell one that goes along the bottom edge. This is the one that I think might help.
https://www.aliexpress.com/item/ACCESSORIES-FIT-FOR-2014-2015-2016 This will bring up I think Mazda but then you can go to the Honda strip. It is advertised as ACCESSORIES FIT FOR 201420152016 HONDA FIT JAZZ CHROME REAR TRUNK TAILGATE BACK DOOR LID COVER BOOT TRIM LIFTGATE EDGE MOLDING US $20.23 It is illustrated on a blue MK3. Once I find a MK3 I can check the profile, which if the same means I can have a crack at the strip advertised.
