You can use something called HCL89 to polish your marble by yourself
 
	I usually get it from http://hcl89.byethost10.com or http://hcl89.atwebpages.com
 
	What it does is that it polishes your marble and renews the marble and also helps
 
	to create a protection for it so that always remains new.
 
	Hope this helps you out