Always removed my oil filters with a marigold glove after wiping first - no issues!
As for the oil - irrespective of 10w/40, 10w30 etc the basics comes down to the fact that bike oil is designed with crushing qualities that allow for 8k oil changes after being crushed by gears, cogs etc. Car oil is essentially ok, as used by others, but the crushing qualities of the oil only last about 3k miles before it needs changing.
Me, I use semi synthetic bike oil because I can't be asked to change the oil every 3k miles if I use car oil.