The present invention concerns a method of applying a coating (11, 12) to a glass sleeve (3) with an inner surface (5) and an outer surface (7), which glass sleeve (3) is realized as a part of a solar-receiver tube (1). Thereby, the coating (11, 2) is solely applied to one of the said surfaces (5, 7) of the glass sleeve (3). The invention also concerns such glass sleeve (3) a method of fixing such glass sleeve (3) in an interior of a coating tank, such coating tank (35) and a fixing arrangement (28) for fixing such glass sleeve (3) in an interior of a coating tank (35).