Figure 4. Combined application of the acid-hot water method and medium-scale waterblasting technique (Wagner watergun). Lower Campanian inarticulate brachiopod, Crania stobaei, from Ivö Klack, Sweden. GM 2004.920. 1-3. Successive stages of removal of surface matrix. Scale bar 10 mm. 4. Close-up of encrustations of bryozoans and serpulids. Scale bar 5 mm. 5. Close-up of bryozoan colony. Scale bar 1 mm.