This feature has been added on the 21st December 2018 update.
Now certain gun skins can be enchaned in the "Lab".
Players can acquire upgradable skins from the Battle Royale Crates.
New effects are added for different levels.
"Sophisticated surface treatment" and "Parts level-up" items are required to level up gun skins.
Level 1 – Basic looks: Basic status of upgradable skin
Level 2 – Kill special effects: New effects are displayed when knocking down enemy
Level 3 – High quality looks: New looks to the upgradable skins
Level 4 – Kill alert: New kill alert effects
Level 5 – Hit special effects:
Level 6 – Winter looks: New looks to the upgradable skins
Level 7 – Looting box: New looks to looting box when enemy dies
"Sophisticated surface treatment" can be acquired from the store by spending Silver pieces.
"Parts level-up" item can be acquired by decompositioning the dedicated skin.
(It can only be decomposed when player owns multiple number of same skins)
Skin’s grade may vary depending on the upgraded level.
The above effects are only available when upgradable skin is applied to the gun and used in-game.