a smart player bet to protect a J on the turn you must be crazy my friend. a smart player would check raise it because he would expect you to bet your range again on the turn.
so donking will actually save you his opponent a bet. and a smart player would he let go of 1 extra big bet. consider this. do you think he would donk because he now got top pair and expect 1 or 2 calls. or if he checks and lets you bet and one call and then he raises. then he would get 2 more bets from you two together , to see a river.
all in all. Check Raise gives you more value than donking does.
a donk bet is exactly what it says FOR DONKS!
in these low stakes a read i come across all the time. the fish and whales i hunt down are pretty much face up. if they donk the turn and lets say its a Q to a 5J2 board. they got the queen .. and i can actually go muck my 77s .
other than 1 or 2 spots , dont get in the habbit of donking.
Id probably bet the turn most of the times. but then again two limpers c/c us on the flop which is decently connected. they limp with anything. wouldn't surprise me if one of them had a 5 and they are never letting them go
as my game is now and looking at these stakes i would just give up against two.. but depends on how much they are folding flop / turn cbets ..
if turn was a 6 i would insta give up no reason in giving them more bets than you need to.
all that to protect ones hand i think you need to take a look at some articles about that because in this case and spot its not to protect a hand. what would he protect it against ? if he has a jack and the other guy a 5 . then happy days for him. At this very moment i can't come up with a spot where to protect. but i think your idea of "protecting your hand" is a tiny bit different than what its meant to be. regarding this hand and spot.