Be careful with deacidification. It seems easier to do than it used to be, but I'm not sure it's any more effective. I would leave that kind of work to conservators, because there's no way to know if you are doing it right until it is too late, and it is risky.
Acid burn is delayed by deacidification, which is the process of adding a buffer to offset the effects of acidic components in the paper. Discoloration from acid burn will still happen eventually, after the buffer is used up. In Newsprint, it will happen sooner than it would show up in better quality paper.
The main problem is that liquid carries the buffer into the paper's fibers inconsistently. That is, some fibers soak up more of it than other fibers. With that, some areas of the paper resist acid burn longer than other areas. So, when discoloration occurs, it may be inconsistent and blotchy.
There are other potential problems with deacidification, too. Soaking the paper is an invasive process. The paper may be extremely fragile while it is wet, and must be handled carefully until dry. Any water-soluble inks or paints could run or bleed. Soil on the paper (especially common on old paper) could be unseen until the moisture is applied, and permanent, unsightly tidelines could form during drying.
Ask me how I know that.:kaffeetrinker_2: