I glass bead everything. The exception being things like valve covers since they are baffled and you dont want abrasives up inside there where you cant get it out.
Those are fender extensions, not headlight shells....just fyi. You can use the stripper on those if you dont have access to a blast cabinet. You will want to wash them with soapy water after to get rid of all the stripper residue. Honestly you might just sand those by hand, its factory paint and does not look to have any adhesion issues. Sand then do your body work and seal it.