I have used this company with very good match for the 85 jeep and the 86 honda, below is the link for the 84.
https://www.automotivetouchup.com/touch ... ll-models/
Get their better clear coat, expensive but it has a great resistance to scratches, I clear coated the motorcycle gas tank with it 3 or 4 years ago.
That is a tough one for the interior, I have done acrylic using various mix from the local art supply store. The acrylic is very resistant, I used it for steering column and touch up the wood on the outside, it was good for at least 4 years until the laminate peeled off.