Paint the background behind the vase with the original colours and more Titanium White. The red in the middle is Cadmium Red and the white on the right has a little blue. Apply roughly and by applying around the objects the background, or negative space, helps to create greater depth and 3D on these.
On the tablecloths once again apply highlights as before but with more white. Use a tiny amount of Cadmium Yellow to add luminosity, strengthen shadows on the cloths with white, winsor blue and a little cadmium red (violet will add more colour drama).
You can use a painting (palette) knife as I did to create sharper edges on the folds.
Finally, make sure that the whites on the vase are bright enough so, if necessary, glaze in some Titanium White with some liquin. This will help to create a more lustrous effect.
p.s. If adding the piece of masking tape use a transparent white and liquin so that the underlying colours come through.