Older white models can become yellowed with age. What can be done to whiten them up again?

To remove yellow from white models, wash the model in a lemon-based dish detergent. Mix 1 cup bleach with 4 gallons of hot water and immerse the model for up to one hour depending on the amount of yellow to be whitened. To spot clean models, use a stronger solution of 2 cups bleach to 4 gallons water.

CAUTION: Wear rubber gloves and avoid breathing fumes. More.

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