They need a rubber tube or something the right size that will fill the slot neatly and look finished. I am on it, it is the small things that pull it all together
Looks right altho they were painted with the car. Can i unscrew them to remove panel to gain access to wiper well? Mine looking a bit grubby down there
Mine were painted with the car but still look rubbish, I have a plan and will post before and after images
These on mine are wrong - correct screw is black and has what Zip call a Phillibuster head...... presumably what we would call a Pan head?. Oddly the rear deck vent fixing screws are also black but Zip offer them also in chrome. 
Like Ross said , paint them body colour or you could try the plastic cup washers with the hinged cap like used to fix registration plate if they fit through the slots . You could then paint them body colour .Mine were painted with the car but still look rubbish, I have a plan and will post before and after images
A quick fix til I find the correct rubber window seal I used on my beach buggy build . May upset the ncrs crew 🫣
Wow! Funny isnt it, to my eye that looks infinitely better , as I always thought something was missing . And mine were already painted blue but I still thought they looked wrong. They say each to their own. Thanks for everyone’s thought's and input.Hmmm....is that really an improvement? When painted body colour the exposed screw heads are practically invisible unless you actively look for them.
Your solution looks as is you've got something black caught in the grille - which of course you have.
I dont think the mirror or number plate caps would fit and I think they would look even more out of place
I think I'm with you on that - to me the screws just stand out a mile away, and make it look like a cover is missing / been stolen from that section.Wow! Funny isnt it, to my eye that looks infinitely better , as I always thought something was missing . And mine were already painted blue but I still thought they looked wrong. They say each to their own. Thanks for everyone’s thought's and input.
Too true. Certainly early C3 'Vettes bristle with unconcealed fasteners to a level we wouldn't tolerate in a modern car. Fastener heads are visible in the instrument panels, the centre console, the handbrake console, the door cill plates, the rear quarter trim panels and retainers, and the windshield header moulding, to name but a few. The one that strikes me as particularly clumsy, although not readily striking, is the rear door panel fixing to the door....
1980 C3`s aren`t any better either but at least you can take things apart like Nassau said without breaking anything or needing a degree in Origami to work out how things fit !Too true. Certainly early C3 'Vettes bristle with unconcealed fasteners to a level we wouldn't tolerate in a modern car. Fastener heads are visible in the instrument panels, the centre console, the handbrake console, the door cill plates, the rear quarter trim panels and retainers, and the windshield header moulding, to name but a few. The one that strikes me as particularly clumsy, although not readily striking, is the rear door panel fixing to the door....
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It doesn't even work very well.
