Model looks great! Just so you know the FIA ban on cigarette manufacturers was well after the 80's, many kits come either without the decals or blank where the logos go, I had to buy seperate decal sheets for the HB logos that go with a sport Quattro trans kit I bought which was the car from the '84 monte carlo.
Not sure if manufacturers are omitting them because of trademark or what but that car is the 1984 qatar winner and is 100% definitely supposed to have rothmans decals. You'll notice several other versions of that kit omit them all together or have the background logo with font omitted, I seem to remember the early versions of that kit being done that way.
I personally think nunu should have just left that space blank instead of putting "racing" stylized as the rothmans logo, I've never seen that before and the car certainly never raced in that livery.
I know a few companies make correction add on decals for that 24011 kit, like bsmodels.be
Car still looks great though!