exterior steel door: peeling latex
Hoping for some help... steel front door was painted twice: once ~10y ago and once ~5y ago. Most recent job was poor, resulting in bubbling, etc. Finally got around to trying to fix, and as I scraped away the bubbling some of the paint layers peeled away, leaving jagged lines of peeled paint. So I started scraping more (eeek!). Do I now have to scrape the entire door? Tried an orbital sander with 40 grit, it doesn't seem to take off much. Any chemistry I can use, or maybe heat from a hairdryer? Any advice much appreciated.