Reviewed by Michael Wilson - 9th Apr, 2021 Used on a black... Used on a black fabric convertible car roof which had gone a little green. Simple to use with clear instructions. Thusfar 2 applications, whilst producing a decent improvement, have not totally resolved our issue. I have just about enough product left for a 3 attempt which, based on my experience, I will leave on and agitate for a little longer. Bought a decent firmish scrubbing brush to ensure the cleaner was decently applied. You can actually see the green mould lifting from the fabric and a friendly word of advice, make sure you thoroughly rinse after the job is done.