Test a small unobtrusive area by rubbing with a white cloth dampened with product as any damage will be irreversible.
 
Use neat and spray or wipe directly onto surface to be treated and leave for a few minutes to penetrate, agitate with a cloth or, for persistent marks, an abrasive hand pad.
 
Porous surfaces are best treated with a brush to penetrate pores.
 
Do not use in enclosed or confined spaces