At 17 Marcelo had his first electric guitar, and except for a couple of months with Miguel and Alejandro Moro Vilanova, taught himself the method of "Elementary Training for Musicians" by Paul Hindemith. He later traveled to the U.S. where he studied and internalized other methods of Ande Flavelle and Doug Marks, which he then applied in their classrooms.

In 1984, first writes a column for the magazine "Rocker". From '87 to '92 and again in '95 was one of the principal contributors to the magazine "The music stand." From '92 to '94 was part of the magazine "Music" as a deputy editor and columnist. From '91 to '99 participated as a collaborator of the magazine "The Screen". During the year '97 wrote a column in the supplement "The Rocker" included in the National Rock CD collection of the magazine "News". Since April of '96 until the end of 2001 serves as editor of the magazine "Music Shop", the first to specialize in the field of equipment and musical instruments. From April 2002 he started to write the first technical consultation held in a Spanish-language website on guitar, adding to www.guitarraonline.com.ar ("The corner of the guitar"). They also performed tests of equipment and features. In 2004 a series of columns written for the magazine "Guitarist", and in 2005 began to write in "Guitar Now", a Spanish magazine that includes audio and CD Rom, which publishes a monthly column and performs testing instruments. From 2006 to 2009, Marcelo Roascio directs the magazine "Guitarristas.Ar." Since June 2009, is the editor responsible for the songbooks "To Play" from the publisher Melos (ex Ricordi). In 2010, Roascio begins to direct the magazine "All Guitar and Bass", sold in kiosks in Argentina, Uruguay and Chile, with collaborators like Don Vilanova, Ricardo Pellican, Daniel Telis, Vernon Neilly, Carina Alfie, Rinaldo Rafanelli, Bill Hudson and Ash Zeballos, among others.