hi, im a 48 year old plasterer, old skool float n set. i was introduced to these s*p*r*lex trowels not long ago. i normally use my marshall towns ss for everything. laying on, up to the final trowel, a mate gave me a s*p*r*lex a couple of weeks ago and i used it to do a ceiling. laid everything on with my marshall town and troweled up with the s*p*r*lex. 2 days later the customer called me back to look at the ceiling when it was painted. it looked terrible, bumpy a rough. i had to do it again (highly embarressed ) ive never had a complaint in my years till then. ?????????????