The top if it is a veneer it is 0.6mm thick but nevertheless people have tried to back stain it with black.
You can try to do it with caution.
1. Use an alcohol based black dye and dilute it in such a way that it is not too black but just stains the top.
2. Apply diluted black dye to top as fast as you can and wipe it back with alcohol /spirits to remove the excess dye
3. It's better to restain it with black again using another coat using same method rather than using a very black dye in a single coat and repeat wiping excess dye with mineral spirits or alcohol
4. For sanding Never sand before you dye. This is very important. You don't want to take more wood before. Just make sure there are no glue spots. Or after the first coat you can see where the dye has not taken and sand that area with 220 on a sponge alone
5. Sand with 220 on a singe gently with no pressure at all with the grains of the wood. Each time make sure you have not passed through the veneer
6. Wipe it with alcohol to remove extra dust before u stain in colour
This was mine when I did thin black stain. I obviously did a few mistakes. I wish I had gone much darker black at first go for the grain to pop better.
If u are going to do a darker coloured dye and then a light colour dye on top it's better to skip black and use the darker dye as base stain
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