Bug Squash, APC, Or Strip Down

Which one would be best on neglected paint covered in road film, dirt, bugs, tar, etc?

My typical process has been Bug Squash diluted 1:1, spray and let dwell, then use SS&S to wash, then rinse well. Would APC or Strip Down be more effective for a deep cleaning? If so, what would be the recommended dilution ratio on APC that would be safe for paint, glass, trim?

I see a lot of neglected cars that either go through a tunnel wash every once in a while or cars that do not get washed at all.
Your on the right track, it's hard to have a set way in removing/working them off the paint. APC is another way if the Bug Squash won't do or maybe the Strip Down Wax Stripper might do.