Always use the cheapest and thinnest foil you can find (not renolds wrap - but like 99 cent store stuff for household alumimum). For glue either a can of spray mount or "gold leaf size" and finally the application with Q-tips as an initial burnisher and on to tooth picks for final burnishing. Also, as I discovered from FightingJoe, Don't be afraid to use either side of the foil - one side is glossy and the other side is flat.
It is always best to work on a panel by panel basis with the seams located in the panel lines. For Compound curves and intakes use smaller pieces with a very small overlap.
For most wrinkles a good burnishing with a rounded tooth pick will suffice - but if not, well - remove the offending piece and redo.
3d modelling is an option
a true mental excercise in frusrtation