same with autoglym super resin polish, dont use it too often as it has a cutting compound in it and will soon wear away your clear coat, the thing with red cars it that they fade really easy, even worse when it is summer, so the way to stop this is to use a polish and wax plus a sealant, what i would reccomend to you is:
menzerna IP for the prep, this will bring the colour back and bring out the depth of the shine
http://www.cleanyourcar.co.uk/polish.../prod_229.html
go over this with a decent wax, collinite 476 is a very good and long lasting wax, i personally use zymol but its a tad expensive - collinite here:
http://www.cleanyourcar.co.uk/wax/co.../prod_207.html
then top this off with a durable selant which will help stop the sun from fading the paint :
http://www.cleanyourcar.co.uk/sealan.../prod_355.html
or you could try an all in one polish like this:
http://www.cleanyourcar.co.uk/sealan.../prod_380.html