I purchased a very plain, chest of drawers-style dresser at an auction, with the intent to change its color from a reddish brown that’s neither dark or light to a deep espresso. I don’t know what kind of wood it’s made of, but the existing varnish and stain is in great condition. Then I went to Lowe’s, bought Motsenbocker’s Lift Off water-based paint and varnish remover, some foam brushes, gloves, (forgot the putty knife), and Minwax Polyshades, bombay mahogany satin.

So, since I’ve never altered a piece of furniture in my life, I went to the How-to part of the Lowe’s site seeking advice. I’m now completely confused.

At this point, I’ve looked at the Polyshade I have, and I don’t think it’s going to give me the color I want. So, I’m going to return it, but I don’t know what to replace it with! Do I need wood conditioner? Grain filler? A separate stain and finish? Help!
What's a sponge type block?
Does it matter what I use to apply the stain? If so, what should I use?

If the finish is intact its a good thing.
Try to chip a small piece off from an inconspicuous area.
If you see light bare wood , the color is in the finish.
Keep that in mind.
Stripping must be done completely to get decent results.
Sanding may not be necessary if the finish comes off cleanly.
Would try using rags & bronze wool first & if absolutely necessary a very light sanding.
Avoid scraping & when you get a “putty knife ” use cheap plastic throw aways.
While you’re at it, throw away the foam brushes.
The Minwax polyshades is very unforgiving .
if it turns out to be a hard wood or hardwood veneer might consider a water or alcohol soluble stain rather than a drying oilstain.
Hardwoods in general do not allow stain to penetrate which is why
the color is very often on not in the wood.
Minwax has water based tinted finishes which are a little better.
Better yet would be giong online & looking for tinted lacquers in spraycans…… worth the wait while it ships. & you can get the stripping done.
There is no one best way to refinish .
By all means look into refinishing sites & books for tips on prep work
& how to build up a good finish
Had a shop & a good deal of my business was undoing failed DIY attempts.
Basically
Dark coloring can be difficult to do evenly, even w/ professional materials & spray gear
.Avoid polyurethanes unlesss sprayed , properly rubbed out & built up slowly.
Mess up & its hard do undo.
Spraycans can give excellent results.
Sealants are not required.
Wouldn’t use a grain filler.
Sponge blocks are sponges that have abrasive imbedded in them .
Not for fine finishing.
When cabinetmakers do sand they use hard wood blocks sometimes w/ thin cloth under the very fine finishing sandpaper .
If you are applying stain, lint free rags are better than foam brushes .
If you do a bit more research esp on the prep/ finish application & take your time you can expect good results.
Best regards.