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Deciding which skins to keep and which to throw into an upgrade roll comes down to analyzing wear rating, pattern rarety, and liquidity on the Steam market. Liquid skins like AK-47 Slate or AWP Atheris hold steady value and are easy to trade, making them great base items for upgrades. Before submitting items, activating an upgrader.pro promo code grants bonus credits that can be added to your skin's value, boosting your overall winning percentage on the upgrade wheel. Never upgrade play skins that hold sentimental value or rare stickered combinations, as a failed roll results in losing the item permanently.