Repainting a painted floor

[AV8R4AA]

Hello,
I have a painted floor on a solid concrete floor now. There is no peeling or chipping.
The floor paint is estimated to be 5 years old. There is no shine left in the paint.
The paint has a flat sheen.
My only complaint is that i am getting staining that is becoming harder to remove.
Today I used an aggressive floor brush with soap and water. It came out better, but the floor has stains from tire and oil spots.
I am interested in either repainting the floor or using some type of clear coat.

I would like to go a shape lighter.
There are no flakes just paint.
There seems to be no sand for grit in the paint now.
I want a nicer sheen, but do not want an Ice skate slippery.

What are my options?

 

[Amitygravel]

Check with someone like Sherman-Williams or a PPG Paint dealer.
They can guide you on the paint type to use.
Used to be able to buy pumice to mix with paint , that would give you the non-slip feature you want.
Just mix in with the paint and keep it stirred while applying.

 

[I void warranties]

I thought you might be interested in reading this thread:
http://www.garagejournal.com/forum/showthread.php?t=181620&referrerid=75950