What do you use to lock trigger screw adjustments ?

I have used Clear F/nail polish for over 15 yrs, on guitar parts , airguns even, on a nut & bolt on a Harley, ( I was out of Loctite, it is still on the bike) , I found this method by accident , my daughter had it sitting around & I tried it , & yes you can readjust , no problem.. on another subject Jarmstrong , do you still have the Zbroia Kozak ? if so have you done anything to quite it down ?, I have mine back together, got the stock dipped in Gator, roger
 
Many recommend vibra-tite 121 Series Medium-Strength Threadlocker for screws you want to lock but still be able to adjust a few times without reapplying. You maybe able to find it cheaper, but here is a link:

https://www.grainger.com/product/VIBRA-TITE-121-Series-Medium-Strength-49CJ63

The convenience is it gives you one product in the event you have other bolts/screws you need to lock down securely on the gun, and is small enough to throw in a gun bag.