I'm kind of late to this one.
I've done Lith a couple of times. Very "seat of my pants". I browsed through Tim Rudman's book, just to be sure I'd have all the right supplies.
And just went for it. I haven't tried pre-exposng the paper. So next time I might.
And I read that you can add some sodium sulphite to the developer , to inhibit pepper fogging.
But haven't tried that yet.
I really like using Ilford IV paper. But it takes a really longtime for the developer to take. & I read that it's best to heat the developer for the process to speed up.
So the 1st time I used a heating pad wrapped in a towel & placed it under the developing try. Worked pretty good. Later I picked up a warming tray on ebay for about $10.
My prints took 30-40mins..just in developer. & I spent most of the time in the dark.
Shutting the safe lights, and only turning them on to check on the progress. After 8 hours only coming up with 3 prints.
Could be I'm doing something wrong to make it take so long. But in the end I was happy with the out come.
Other papers don't take so long. But I really like the tones I get with Ilford..so worth the LONG wait.
Each paper gives different tones, without having to tone it.