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Lowe’s has the Plasti Dip 11-fl oz Silver Aerosol Spray Coating for just $ 1.37. YMMV.
I think this is a pick-up only item.
https://www.lowes.com/pd/Plasti-D…/999956444

Plasti Dip Metalizer is a shimmering, metallic finish while letting the color of the Plasti Dip underneath show through.
Create custom colors
Adds a shimmering, metallic finish while letting the color of the Plasti Dip underneath show through
Adds a shiny, metallic finish