Grab some Autosol... 10$ at Canadian Tire. Use a bunch of Qtips to polish the grooves on the sear with Autosol and the rails it moves on. Itll take 5 mins and turn out better than sandpaper unless Igor left a bunch of 0.5mm burs in the sear grooves. Do a mineral spirits cleaning of the trigger group, down to all spring surfaces. Lightly oil each part, preferably by hand. This gave my Russian SKS a nice smooth two stage pull with minimal creep. Keep in mind autosol will strip the finish if you apply it carelessly, but your sear grooves/rails may have been bare of it from the get go, as was mine. Autosol will do what high grit sandpaper does, and more
You can Dremel out the pin holes to speed up future takedown/assembly of the trigger group. Use a cylinder-shaped Dremel engraving/carving bit that fits the pins hole, without a hammer's encouragement. 4k or 2k RPM for 3 or 5 seconds should do the trick, results may vary. Took me six hours to disassemble my first SKS trigger group, tight bastard pins they were. Now it takes five minutes or less, the pins knock out with two to three solid taps but aint moving lol. Highly reccomend you do this the first time... Otherwise you might spend six hours disassembling the trigger group you just reassembled, because you put your safety spring back in upside down, just like me.
Dont feel discouraged by how daunting the trigger group looks. I was uncertain about even disassembling it at first, but I took it slow, learned a lot, and ended up getting my moneys worth for that 500$ SKS. There's a lot of good advice in this thread and on CGN from experienced people that can help you in fixing any imperfections specific to your rifle. My rifle was all matching and from what I can tell it was hardly previously enjoyed, if at all. Dont take this as gospel for every SKS, its the bare minimum work for an ideal example. If I can do it, I am certain you can as well. There is always the gunsmith route if you dont wanna risk it though. Hope this helps

