Well, I'll give my "experiences" with removing Bachmann ,or any other lettering.
It is relatively easy, but afterward you still need to either spot paint or totally repaint (better plan) the model.
I use denatured alcohol, not the drug store kind for cuts, etc. but the home store type.
It seems to be a bit "healthier".
The alco. can be applied with a Q-Tip or small paint brush.
Let it sit a few minutes and then begin "scrubbibg" the lettering off.
Of course it will leave an area where this was done but the new decals / dry transfers will possibly cover the area OK.
Still, the best ways around this is to buy only unlettered models,
or invest in some brake fluid and take the paint off totally.
I have used Floquil's ELO before and it seemed to not work sometimes.
But, with all that, it's whatever floats yer boat...
____________________ It doesn't matter if you win or lose, its' how you rig the game.
I've found a way to confine ELO and possibly other solvents to a specific area.
In my case I wanted to remove markings on a curved surface without the fluid flowing away,
but the trick is also useful if you want to remove a specific marking without disturbing others nearby.
What you do is cut a piece of toilet paper so it's just large enough to cover the lettering you wish to remove,
place it on the model, then let the fluid soak into it.
I repeatedly used a Q-Tip to transfer the fluid,
and pressed it into the TP until I could clearly see all the letters underneath.
After letting the markings soak for a few minutes,
I removed the toilet paper and the lettering came off with very little pressure.
Adjacent letters / numbers aren't affected because the toilet paper didn't touch them,
and neither did the soaked Q-Tips.