No I bedded them properly. And I just changed the pads again to see if the other pads were glazed maybe but even the new ones are slightly pulsating which means the rotors are warped I suppose. Does anyone know if any glazing/brake pad residue can cling to the rotors making them do this and the rotors just need to be cleaned?
Yes, you will have residual pad material on the rotors from the old pads. This must be cleaned from the rotors before installing the new pads or problems can occur. This should be done every time you change pads.
Give all the braking area of the rotors a thorough scrub with a scotchbrite scouring pad or the like to remove all the old pad material. Once done give them a wipe over with some brake cleaner.
You wouldn't normally need to do this bit for the pads, but you will have transferred some old pad material onto the new pads, so give the pads a quick rub off with some emery cloth to remove that material and any sign of glaze.
While you have the pads out, not a bad idea to get an old toothbrush and with some liquids detergent and a little water give the caliper pistons a clean then wipe all the muck out and make sure they are retracting freely and evenly. Important for any caliper but especially for 6 pots. Also while you are there make sure your pad pins are clean and smooth.
Put it all back together and now you are ready to go and repeat the bedding in process and all should be good.
Never come to a complete stop while bedding in the new pads as this will leave an uneven distribution of pad material and can cause pulsing or shuddering.
Hope that solves the issue for you. If not you will need to check run out on your rotors.