gig work transportation costs

[coasttocoast]

I work a W2 job 25 miles west from my home. I also do contract 1099 work in an unrelated industry in my off time; these jobs last a few weeks and are located 25 miles east from home. Am I able to deduct any of the mileage to the contract work site? Here are the scenarios I have read but it gets very confusing...

1) if i drive straight from W2 location (regular job) to the contract site (second job) am I able to deduct the mileage between the two (50 miles), excluding the initial "commute" to W2 and home from the contract site?

2) if i were to stop at home first to change or get supplies before proceeding on to the contract site, does that now make both legs a commute and all the mileage nondeductible?

3) the IRS site has a graphic (pub 463, figure B) showing travel from home to a temporary work location (contract job) is deductible if you have another regular or main job work site (W2), does this mean I can deduct all the mileage for contract work? or do the work sites have to be related?

[NCperson]

1) yes.  correct

2) yes. correct 

3)  Can not deduct the mileage The temporary job must be in the same trade or business in order to deduct the mileage and you state it is in an unrelated industry.  Look at the explanation just below the graphic: 

Temporary work location. If you have one or more regular work locations away from your home and you commute to a temporary work location in the same trade or business, you can deduct the expenses of the daily round-trip transportation between your home and the temporary location, regardless of distance.
If your employment at a work location is realistically expected to last (and does in fact last) for 1 year or less, the employment is temporary unless there are facts and circumstances that would indicate otherwise.