How To Make Center Caps
The caps I got for my steel wheels, similar to the wheels you pictured, were only $6 from 4wheelparts. They site behind the wheel and have a tiny lip that holds them in place like the pinch seam on the cans.
I do like the use of sterno though.
I do like the use of sterno though.



maybe wrapping some type of film around them while hammering them in would work?