3 guns to refurbish completely

A lady brought in 3 guns she inherited recently. All 3 were rusted and one was especially bad.

The 2 pumps, a Winchester model 1890 made in 1919 and a Remington model 12 were covered in spots of rust but nothing really that bad. We should be able to get them back to "as new". The 3rd one was a Winchester model 94 in 30-30. This one is bad. Someone decided to try to get the rust off by sandpapering it and really made a mess of it. The rust pits are deep and it is going to take some serious hand polishing to get it back alive but I told her we would get it back to like new. Hopefully I didn't put my foot in my mouth.