Jones said the Palin pal, 19, also works out for an impressive three hours daily, six nights a week in the gym to sculpt his body for the "Playgirl" shoot.
"He's going to be more toned and more defined," said Jones, a former Mr. Alaska competitor. "I'd like to see him with rounder and more muscular shoulders, with a fuller chest. We're going to firm his abs up [and give him a] smaller waist," Jones told People.
Johnston, who is currently training in Anchorage, Alaska, was approached by the girlie nudie mag earlier this fall, Johnston's attorney Rex Butler said.
Johnston spilled about the Palin family saga in early September, saying in a Vanity Fair interview the Palin household was filled with "talk of divorce," a lack of sound parenting, and depression -- especially on the part of vice-presidential wanna-be Sarah Palin.