Advice painting carbon fork

[ibike ynot]

I have a yellow Giant TCR (ONCE edition) with a Bianchi carbon fork I would like to paint/cover the Blue Bianchi logo 

Was thinking of using one of the following options

1. Enamel model paint 

2. Vinyl sticker 

3. Spray paint 

What level of prep work is required ? I'm assuming light scuffing of area should be adequate for adhesion 

Any advice would be appreciated 

[Zebra]

Maybe get an identical-sized DECAL made up, so you still ‘honour’ the Carbon, with ONCE printed on a matching YELLOW, and apply OVER the existing decal.

and then a really micro decal to cover over the very small Bianchi wording?

i would not respray it; rather re-decal it, my 5c.

Chris