The tank is painted by the factory in house , does have clear coat on it (not much i say!) –
Are you repainting the tank? Best to prep it well, then when its all painted, the clear coat can be sprayed over, its called lacquar
Or unless you mean a “cling film” type of film that’s transparent , to protect from bags etc?
You can check out getgeared UK, sportsbikeshop, j&saccessories for such things , they may call them by different names, strange lol.
// Meditation doesn't mean you have to sit still....
My bike is two weeks old with tank pad and my belt or my jacket zip slightly scratched the paint finish, there are 3M clear film pre cut template for various bikes except for Hyosung these can be bought to simply apply wet on petrol tank or to buy a sheet and try to wrap it over petrol tank for protecting the painted surface