I want to repaint our steel entry doors, which presumably were pre-primed 30 years or so ago. Where the later layers have peeled off, the earlier layers still seem to be in good shape, and there is no sign of rust.
Is there any chemical stripper that would be very effective with those more recent (latex?) layers but have little effect on the original primer. I'd rather not strip them down to bare metal and start over if it can be avoided.