I have a 1.2 Mk1 clio and i think the pads are going, when its wet i have noticed recently that untill the brakes warm up i have no stopping power, this has only been happening since wednesday. Also the brake dust a bit of a dodgy colour. Will have the wheels off and check the pads at some point.
What pads would you recommend, was thinking about greenstuff, but they have had some bad reviews on here. Bear in mind it is only a 1.2, so what applies to a 172 will not necessarly apply to mine.