a trick we used to use with formica... after the glue dries on both pieces, lay a piece of newspaper in between the metal and the vinyl to keep the glues apart. position the vinyl so it covers.
slide the paper out as you press the vinyl down.
I'm getting ready to glue new vinyl material to my dash. I read an article about doing this, with helpful tips, many years ago. I thought I kept it ... but I can't find it.