Its funny how long the bodging threads go on for..
As I've said previously the ONLY way to find out what works for YOU is to try and test it yoursel,f just because I can use a sponge float and leave a nice finish doesn't mean you will, same for all the different types of trowels, I prefer the plaziflex Marshy prefers the s*p*r*lex, Only you can decide which works best for you and you can only do this by trying them yourselfI'd rather get an opinion from here as to what's good and what's not than try and find out myself. Evolution happens in all businesses and trades but not all for the best.
I'd ride herI've taken a young lass on who is good with a sponge!!??
I put a float over finish from time to time.