Help to restore sheen to vintageTulip Table laminate top  

sheen on sheen on harvest moon
Try a local car detailer who does dent and paint work.
They usually work for the used car dealerships. They can spray a clear coat
over your laminate top that is very durable and won't yellow. I don't know where you live but one good company is called integrity auto.
Brent

You
might first want to determine if the table was meant to have a glossy finish. With heavy wear, restaurant tops sometimes change their texture, but (other than scratches) it is unusual for the melamine surface to change texture on a table used in the home.

Sheen problem
I think the sheen changed with the cleaners that must have been used and just general wear for many years. Don't want to spray on a clear coat. Any other suggestions?

try any type of colourless...
try any type of colourless car wax, T-cut or burnishing cream

Meguiar's
Gold Class Clear Coat Liquid Car Wax, will do wonders!