This is the way I do it except I run the oven at 210-220 and depending on the lights check them at 7mins , 10mins , 12min and longer on some until I find the right time for the make and year . While it glue is still hot I use a Snap On hook tool to pull out all the old glue and reseal with fresh butyl . Everyone has their own way , just start off with a lower temp until you get the hang and comfort of it . Good luck on the mod and if you have more questions just ask .
If I can ever get a free moment I need to open mine back up and install the Hella E55 Bixenon D2 projectors and Red and White LED strobes .