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6. Cleanina of metal elements either to remove corrosion or deteriorated <br />paint S61( use the mildest method possible. <br />7. Abrasive cleaning methods, such as low pressure dry grit blasting, may <br />be allowed as long as it does not abrade or damage the surface. <br />A test patch of the cleaning method(s) Shall be reviewed and approved <br />on site by staff of the Historic Preservation Commission of South Bend <br />and St. Joseph County. Test patches Should always be carried out well <br />in advance of cleaning (including exposure to all seasons it possible). <br />9. Cleaning to remove corrosion and paint removal Should be considered <br />only where there is deterioration and as part of an overall maintenance <br />program which involves repainting or applying other appropriate <br />protective coatings. Paint or other coatings help retard the corrosion rate <br />of the metal. Leaving the metal bare will expose the surface to <br />accelerated corrosion. <br />10. Repainting Should be based on paint serialization studies. It an <br />adequate record does not exist repainting Shall be done <br />with colors that are appropriate to the style and period of the building. <br />11 <br />0 16 <br />