I see spots and I'm disappointed

[Jon T Knisk]

Had gathered some salvaged wood from an old dinning room table to build a chair for #2 grand daughter. Just a quick project wasn't going for a pristine chair. After cutting, sanding and assembly I applied Dark Walnut stain to match the refurbished roll top desk I finished for her.  I let the satin sit for a while and wiped off to reveal a spotty finish. like this. Does anyone have a probable cause, to avoid this in the future. At this point the Grand Daughter can choose to keep the spots and call the chair, Cheetah or it gets painted.  

Edited January 1, 2016 by Jon T Knisk
In completed statement about this!

[Tpt life]

Looks like there was still some old finish or oil contamination on the wood. That is a common issue with salvage wood. I would strip that back and start with a wash coat of shellac. 

[Trip]

As a general rule: when you work with reclaimed wood of indeterminate providence, a wash coat of #0.5 to #1.0 cut of Super Blonde is best practice.

[Jon T Knisk]

Thanks for the advise, I will suggest this to Daugher and see if she wants that done for my Grand daughter. She may opt to do this at a later date 

1 hour ago, C Shaffer said:

Looks like there was still some old finish or oil contamination on the wood. That is a common issue with salvage wood. I would strip that back and start with a wash coat of shellac. 

Thinking back several years ago, I had reduced the thickness of this wood from 3/4 to 1/2 via a planer, for the remainder of the wood I'll treat it as you suggested

Thanks