It's your money so spend it as you will. If you want to throw it away then throw some this way. As for the smell of LR curing???? Where did you hear that one from?
Fresh water dip will get out any unwanted livestock you don't want. Just make sure you get the FW in all the hidden places.
If this is going to be a reef then who cares what the rock looks like, it should be covered with coral so you never see it.
Just make sure you take it slow because it already sounds like to me that you are in a hurry. Doing things fast will only cause problems later one. Read Omards signature....it says it all!