Lots of good tips on this board. Check out the "Hall of Fame" board here on Steer Planet for a whole big long thread RE this very subject.
Blow, blow, blow & brush, brush, brush are the best answers.
I like to use some vinegar mixed with Sheen (most leave in conditioners need to be "cut", but lots of people use them in place of sheen). Pink oil is good & doesn't require rinsing out. Just keep it light.
Lots of people like to rinse the cattle often, but that has never really been something that I've done a lot of (Mine are lucky to stand in front of fans very much) & I usually do OK. I like to put some vinegar in a bucket with water occasionally & dump it on them after rinsing. After rinsing brush them, then blow them dry, place under fans, & in a fairly dark place during the day.
Feeding some melatonin will make them "shag up". I've never fed it, but I know people who have & swear by it.
If you are "willing to do anything"... build him a cool room. ;-) I don't have one of those either, but they obviously help.
If you have questions, PM Olson Family Shorthorns... he takes the hair growing thing very seriously & he probably wouldn't mind offering some tips & suggestions. Might be a day or 2 before he gets back home though.