I have made dozens of pleated masks in Liberty print and plain fabrics, suitable for males and females. I have offered them free with a charity donation, I made them to suit my own preferences, i.e. 3 layers with nose wire, plenty of depth to fit well under the chin and soft elastic. I had a rest for a while but am now starting a few Christmas ones, with more different fabrics on order.
A lot of the recipients have come back for more, so I think I have hit on a good design for most.
Just a warning about using vacuum cleaner Hepa filters - I have read that they can have harmful fibreglass particles.
Re painting metal bistro garden set