I have just started the process of buying a used Vauxhall Vectra Estate. It will be a couple of weeks before the car arrives at my local dealer where it will receive a full service and ‘valeting’ (I think that is how you spell it). Along with offers of extended guarantees the salesman went into a pitch about the wonders of a product called Supagard. This would entail them applying paint sealant to the exterior, a resin-based protective coat to the fabrics and carpets, and a protective finish to the vehicle plastics. This was going to give the car a fresh polished look for years and make cleaning easier. I thought this sounded interesting as I do like to keep the car looking nice, so I said, “How much ?” "£370" came the short reply. My immediate reaction was that this was a bit steep but the idea seemed good. My present car is a ten year old Cavalier, colour white, and it looks a treat when washed, and polished with Triplewax which I buy at Woolworths for a couple of quid about once every three years. I go over the plastic with a spray I bought at Halfords years ago and all the black moulding still look as good as new. I am sure I can buy these protective sealants and do it myself for a fraction of the quote, but is it worth it ? Do these products actually work? Regards. Dave.