Have a look at Frost website. They sell diy home plating/anodising kits.
https://www.frost.co.uk/Their anodising kit is £117.49.
Haven’t tried them so I don’t know how good they are.
The final finish will depend on the prep. Anodising doesn’t hide scratches etc..
It is possible to dye the anodised coating too. I think Dylon cloth dyes work well or you get anodising dyes.
