Translation into Spanish of "scale" as a verb?
The verb "to scale" in Spanish would translate as "escalar", but the accepted meanings are variants of "to climb" (main authoritative sources: Diccionario de la Real Academia Española, http://dle.rae.es/?id=G6T25Xg|G6TYQPC, and María Moliner's Diccionario de Usos del Español). There is no meaning such as "apply a scale factor".
However, the use of "escalar" as "apply a scale factor" is frequent in technical publications. The question is: Shall we use it freely?