Got this for a blue composite door that had faded badly. Everything i read about painting a composite door always with conventional paint was a big No. Eventually i came across Promain website and this product. I can tell you it has saved me the cost of a new front door ! , it has come up looking brand new and has saved me a fortune. I didn't think to take a before and after picture as i was a sceptical it would work, but it really does. I used a lint free cloth to apply the oil and rub it in. I shall now use this once or twice a year to keep my door looking good. 5 star product, try it , its cheaper than a new door !