Yes you can retemper the chocolate that has bloomed.
Heat to 115 F to break the seed crystals and then re-seed with tempered chocolate and bring to temper again.
Can you use chocolate that has bloomed?
Fat and sugar bloom damage the appearance of chocolate and limit its shelf life. Chocolate that has “bloomed” is still safe to eat (as it is a non-perishable food due to its sugar content), but may have an unappetizing appearance and surface texture.
How do you fix bloomed chocolate?
All you can do is try to cove up the bloom. You could try brushing them with luster dust or decor powder, or spray them with either colored cocoa butter or just a fine layer of chocolate thinned with cocoa butter if you have an airbrush or paint sprayer.
Is chocolate OK to eat if it turns white?
(Spoiler alert, it’s still safe to eat!) This white film does not mean the chocolate is moldy or has gone bad. It’s actually just a scientific process called “chocolate bloom”. There are two types of this bloom: sugar bloom and fat bloom.
How do you keep chocolate in tempered?
KEEPING CHOCOLATE IN TEMPER
Place the bowl of chocolate on a heating pad set to low and stir to keep chocolate in the temperature range as needed. Place the bowl of chocolate over, not in, a bowl of warm, not hot water and stir to keep chocolate in the temperature range as needed.