Sorry I took so long to reply!
With the Etude, the pedalling isn't essential but it is a nice effect. I mainly used the pedal to cover the arppegios in the RH, and to help join the LH slurs. With the pedal however, you have to be careful not to smudge the harmonies. Clean the pedal at each harmonic change, and listen carefully to make sure it's clean. If you find this hard, as I did at first, practise v. slowly, and make sure you mark in on the music what you're doing when. Then, after you can do it slowly, increase the speed, until you're happy.
Without the pedal, it's very hard to keep the harmony of the bass notes throughout the whole bar, but it would probably be best to have no pedal, than to pedal really badly. Keep working on it, and you should get it.