l wanna install a bonnet scoop on my hyundai, is it difficult to do so? l do not wanna cut the bonnet(i.e l only want it for appearance) and what about spraying etc? will the bonnet be retouched?

Dude, c'mon.

It is a Hyundai.

Unless you live in a 3rd world country, you're not going to fool anyone.

Seriously. Terrible idea.

You can get some that stick on with double sided tape but you will still have to get it painted the same colour as the bonnet

a bonnet scoop.

scoops r holes/ways for the engine to suck more air. This is because may be the car has a big air intake, intercooler mounted on the top of the engine (like the Subaru WRX & Lancer Evolutions), or other engine parts that really sucks large amount of air. well, if you're going to install a scoop without making changes to the bonnet, for me that would be waste of money & time. if you've done that, u only added drag to ur car is aerodynamics & it may be bothersome at high speeds. well if u really like to add scoops, l respect ur idea.

like the answer earlier, there r scoop accessories which can be installed using double sided tapes. But that is dangerous when you're traveling at high speeds. There is a possibility that the tapes may tear off & hit ur windshield. You do not want that to happen, r you? The other option is to weld the scoop on to the bonnet. This will be safer but the bonnet will be definitely affected by the weld & will be repainted.

As u can see in my answer to ur question, it is not that easy just to add scoop without sacrificing something so do not add a scoop if u do not need to.