Who is Peter ?

dude just shut up. you haven't even seen the man who's riding this bike and you're out here saying their bike is wrong size.
And are you the UCI now? saying it's "forbidden" to use more than 4cm spacer?? what a joke!
Shut up and just ride your fake Ostro!

You don't want ali one ?
Note that Factor, Ostro, etc. decals aren't just stickers stuck onto the paint; they're covered with a clear coat that protects the paint. If you don't want to have to sand and repaint everything, you'll have to stick the new decals over the clear coat, with the risk that the decals won't be exactly the same size (and therefore it will look awful 😮‍💨).