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Prep Rally is a blue base coat from OPI's Infinite Shine line, a two-step system meant to give gel-like shine and wear without a lamp. It goes on before the color coat and is sold in a mini bottle. The line's fans like the glossy finish and easy removal, but this step draws mixed feedback: many owners find it thin, slow to dry and short on wear, and the 2.7 average across 1,300 ratings reflects that. It suits people already using Infinite Shine colors who want the matching base, not shoppers looking for a strengthener.
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Lowest price we've seen: $5.25 on Nov 10. Tracked across 4 stores since Nov 10.
Ratings are low overall, and the complaints center on the base itself rather than the color line. Owners who like it use it as part of the full Infinite Shine routine; others say it stays tacky and chips early.