Morrisons I live between 2 morrisons, 2 miles to one and 2.5 miles to the other, prefer the other it's bigger and the bread is fantastic but thats another story. Going to try that shoe scuff as I have been valeting for years and have failed to keep my bumpers looking nice. BTW click the link below to find a morrisons in london. London Morrison's Stores
im using Meguires Gold Class trim detailer, really good but in comparrison to what has been mentioned very expensive !
..as I have mentioned on what feels like the 3 millionth time on these 'bumper black' threads - use LINSEED OIL!
I go over mine with tar/glue (used for my tyres) and go back over with back to black lasts for ages and good results.
i live on the doorstep of a morrison, could walk there in 2 mins but can never be bothered! best stuff i used for trim is meguiars trim detailer, works a treat for me.
The paint shouldnt flake, just scotch the trims lightly and spray 2 light coats and it should be ok, my bros done this on a whole textured bumper on his audi and smaller trims, works really well I wouldnt attempt it if your not really confident, or just get some scrap trim and try it Dont forget to pre clean the trim before painting, to remove any chemicals such as silicone