Not a good idea, and may not stick anyway.
You say the sanded is rough, how rough?
Got pics? My sanded grout comes out pretty smooth, yours may be the same. Supposedly you used sanded because the joints was 1/8 or wider. So, it should be sanded. It may get a little smoother as time passes.
Jaz
You say the sanded is rough, how rough?
Got pics? My sanded grout comes out pretty smooth, yours may be the same. Supposedly you used sanded because the joints was 1/8 or wider. So, it should be sanded. It may get a little smoother as time passes.
Jaz