I'm not saying that you shouldn't follow any decorum. You can go to office and the only thing required is clean/well pressed clothes (whatever they are). Some may say that tie/pants must etc. In namaz you should be clean (your body and cloths) and then its between you and ALLAH. I take it as the levels of firmness in Imaan. The stronger your faith is the more well dressed you'd be while saying namaz with perfume on.
The underlying idea is to cover your sattar and say Namaz whole heartedly. Thats my point and its better than not saying namaz altogether. The more you'll say namaz the more love of GOD will rise in you and then the more well dressed you'll be while saying it because "to me" these are higher levels of faith.