Brasero (on Mint) handled an iso no problems (so far), quite a relief.
My research however suggests it isn’t so good at burning multiple files all together onto a CD. XFburn or K3b is the oft recommended solution. Be aware that on the Ubuntu family running Gnome desktop you will need lots of binaries and about 200MB of disk space for K3b (its a KDE app).
I’ve been burning data disks on and off for nearly 15 years, and the process always freaks me out – I was probably ‘burned’ in the early days when 1 or 2 out of 3 disk burns would fail. My conscious mind knows the disk quality is better, the drives are more reliable, the computers massively more spec’d out and have substantial buffers available, but even so, you know ..
And people are still complaining some software fails more than it burns, so I’ll keep the fingers crossed and the 4-leaf clover handy.