Well:
1 Brake fluid didn't work
2 The hot air gun wasn't very good
3 My belt sander tended to leave scratches, so I abandoned that rapidly
4 The wire cup brush on the angle grinder made some progress, but after doing a sample area, I figured it would take over 10 hours to do the door
5 So off I went to Toolstation to get some paint stripper. The one that actually scores 4 stars on customer reviews, which seems to be as good as it gets for modern paint strippers ( Home Strip Paint & Varnish Remover 2L by Eco Solutions Product Code: 39051).
This softens the paint sufficiently for a VERY sharp scraper to scrape it off.
This still leaves lots of pfaffing around with the grooves in the door.
Whilst I initially dismissed the idea of a new door, I like the idea far more now.
The one big success was ordering the paint off "thepaintshed.com". Very few retailers had the paint I wanted & they were the cheapest. Delivery was flawless
I ordered at 10:32 am.
I got an e-mail at 11:17am saying it was dispatched
.
Further e-mails followed, including a 1 hour delivery slot next day from DPD.