trying to make a beercap table

[tha5150]

hope this goes here, sorry if not.

i have a wood table i have been using for my work bench on my patio.
the fiance and i went and bought a nice patio set, everything looks nice, except my old wood work bench sitting in the corner. she wants it moved. plus it is going to get hot here in South Florida soon and the A/C would be nice to work on my truck in.

anyways, it is a particle board table, smooth surface, maybe 8x2 ft. i have over 500 beer caps i have collected. i want to place all the caps on the table and pour some sort of polyurithan or something to make a seal. you know when you go to some bars and they have things inside the bar top? same idea, but beer caps. ALOT OF THEM.

what would be my best bet thats not too expensive?