Seems pretty self-explanatory however there are many different factors to look at prior to choosing the products, your contractor, and your timeframe. Are you interior areas of high traffic? Will it be a wet area? UV concerns? Does it need to be low odor? To name a few. Deal with a contractor that does this on a regular basis and knows how to work around a facility that needs to keep operating during the project. This apartment building needed a face lift but there were tiny hairline cracks in the mortar that needed to be addressed. We power washed it and put on a high build Elastomeric coating that effectively bridged the small gaps and now it looks new again.