Care & Maintenance of your Slate:
Routine cleaning
Water marks, usually left by vases etc., this is usually just washed off with warm water and a SMALL amount of soap (washing up liquid), wash thoroughly and then repeat with just warm water to clear away any soap. You will need to feed the slate with slate oil or WD40 to return its finish.
Scratch and surface marks.
Scratches and surface marks (may include white marks). You can redress the slate with a fine wire wool, you will find that this may dull the area and you will need to feed the slate with slate oil or WD40 to return its finish. You may need to do the complete surface to create a matching surface look, again take care with surrounding materials and soft furnishings.
Stain resistance.
Slate, as with other stones are porous. If you want to put anything containing liquid onto it always use a mat, any spillages should be mopped up straight away, if left they will soak in and stain the stone.