I have been following this thread with quite some interest. I did not face problems with BMF not being adhesive (enough) but I noticed differences in thickness and "appearance", as far as the chrome brightness is concerned.
The first time that I worked with this "new quality" was when I did my 1970 Plymouth GTX. The foil seemed to look too "chromy" and I was afraid it's too thick to lay it down and cut it properly. However, I was surprised to find that it looked real good and could be dealt with. The only difference now being that I switched my scalpel blades more often to make them cut through the "thick stuff" properly.
However, this - or any kind of - BMF Chrome foil is very hard to come by here in Europe currently. I have some assumptions what could be the reason for that. The situation definitely worsened in the beginning of the Covid pandemic. So it's no surprise I am looking at self-made alternatives, especially as I am regularly using BMF as a masking material but would actually not require "genuine" BMF for that purpose.
Some weeks ago I found the below tutorial on YT. I think it's interesting because it's actually about making sheets of adhesive foil for using later on, rather than the glue-and-apply-instantly procedure that was shown earlier in this thread. I did some testing myself with the "gold leaf bond" aswell as BMF adhesive but did not succeed yet. I used silicone paper aswell as plastic foil as a carrier material, but it's not been good yet. I believe the secret is in finding a carrier that will allow to apply the adhesive very evenly but still keep it from drying out over time.