I did a lot of the painting, here is a video of how I paint
Things to note – 8 mins to do one coat plus time spent mixing paint, I use good paint thinned 20%
Mini masonry roller to edges, long poles, don’t usually mess so much in corners but use a brush and steps, knotting to door linings already done, sheep skin 300mm roller head with full frame, storage box as paint scuttle, put rollers in paint and cover box between uses, don’t wash roller out even on colour changes!