| 摘要 |
A method of treating a surface (14) such as a ferrous surface. The method includes the steps of: providing an apparatus (10) having a carriage (20) and a treating assembly (12) on the carriage; causing the apparatus to be attracted to the ferrous surface (14') with a force that tends to maintain the apparatus against the ferrous surface yet allows the apparatus to move over the ferrous surface; and moving the apparatus over the ferrous surface to effect treating of the ferrous surface with the treating assembly through manual orientation and movement of the apparatus by a user through application of a maneuvering force by a user from a location spaced from the carriage that allows controlled movement of the apparatus over the ferrous surface.
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