The actual silvering portion of the process usually takes about 2-3 minutes for spray application and 4-5 minutes for pouring application. If you want to speed up the reaction rate of the silver, you can either:
Increase the concentration of reducer used. Change dilution from 1:30 to 1:20 (reducer:deionized water).
Use warm water between 80-85F (not more than 90F) when diluting your silver and reducer solutions.