On the advice of "wilder" from this forum, I have today added my second dose of API's Pimafix to my adult Pearl Danios in the quarantine tank for visual spots...
Like you, I have only ever spotted two spots on any single fish (only two of the group show obvious spots, but all adults in just in case). Earlier today, I added the final "day 6" dose of Protozin, as I was initially worried about the spots being Ich. According to "Wilder" there is no problem mixing Protozin and Pimafix, who has been a member here for ~6 years, so I trust their call and have overlapped medication.
I had raised the QT temperature to 31C in case it was the start of an Ich epidemic, but it has been lowered to the room temperature of 25C now.
In just 24 hours, one of the fish with a spot near its mouth is visually looking much better, the spot looks much less vivid and has decreased in size.
benjoey, I'm simply writing about events with my first ever tropical fish, I'm not recommending a course of action for your situation.
Perhaps try and get a photo or a movie clip to show the forum members your rasboras, good luck!