Don't use Kronenberg, it is tin and rusts - jamming your seat post in.
Coke, Beer, beans all work fine, used them all over the years for shim material, sounds like you would do ok with two or three wraps of Coke can - which you can cut with scissors.
Don't forget to get a little bit of sand paper and smooth down the cut edges to stop you slicing your fingers off.
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Here you can see the bar code off a can of 'wife beater'
Don't use Kronenberg, it is tin and rusts - jamming your seat post in.
Coke, Beer, beans all work fine, used them all over the years for shim material, sounds like you would do ok with two or three wraps of Coke can - which you can cut with scissors.
Don't forget to get a little bit of sand paper and smooth down the cut edges to stop you slicing your fingers off.
.
.
Here you can see the bar code off a can of 'wife beater'
http://img231.imageshack.us/img231/7559/canry2.jpg