THE BEST WAY TO RESTORE SLATE FOR THIS SORT OFAPLICATION IS TO GIVE IT AT LEAST 2 COATS OF CLEAR YAUGHT VARNISH,YOU CAN OBTAIN THE CORRECT AMOUNT OF SHEEN YOU REQUIRE BY SELECTING DIFFERENT FINISHES IE-GLOSS FOR A VERY GOOD SHINE,MATT FOR A DULL FINISH,SEMI SHEEN FOR AN INBETWEEN.
ASK AT YOUR LOCAL DIY STORE FOR ADVCE ON WHICH IS BEST FOR YOUR REQUIRED FINISH
K.MASSEY
December 2004