Perceptions don't completely disappear until enlightenment.
Sensations is the mind conditioner, hence any volitional formations or mental reaction due to perception will have a sensation associated with it.
What you have to do is to look at the sensations equanimously without craving and clinging. This way you are not creating new fabrications due to perception and volitional formations. You cannot get rid off perception altogether until the final leg of the journey.
Mental activities will have an impact on your bodily fabrications also, hence when possible, while engaging in your normal activities, have a look at your breathing, heartbeat, perspiration (not due to external influences like weather). If there is an irregularity start looking at the full cycle of breathing noting it's speed and length also watching the sensation on the upper lip. As the bodily function calm you will experience better sensation in your body hence better mental state. (Don't crave or long for either.)
Also when you see something look at the sensations around your eyes and your head as you perceive it. Similarly to other sense inputs.
When you are sitting in some posture by sensing the outline of your body though feelings on the body. Similarly when you walk, in which case you can see the sensation when your feet touch the ground maybe clothing touching your body when you move around the moving parts of your body. Then look at your body part by part by moving your attention to the relevant part, without trying to visualize, verbalize, imagine the part (otherwise you are dealing with concepts and / or verbal fabrications)
Also you meet people you will form perceptions about them. If it is not good try to develop compassion. It is is good do not get attached. If it is lustful think if their parts are separated whether you would consider the person beautiful (including you self). Again for food craving imagine excretion. When doing this be mindful of the sensation such actions create. If companion or sense of morality has made you loose the balance of your mind like you do not want to walk fearing that you might step on an insect then your perception has polarised in the opposite direction. The reason to practice antidotes to certain perception should generally be done in a situation when a stimuli causes a sensation which triggers associated memories or thoughts which further trigger sensation snowballing. The antidote is to neutralise the sensation to manageable levels so you mental balance is restored. If you perceive food as repulsive in a office party so you do not become glutton, but in effect loose apatite or feel like throwing up or even worse like become anorexic then you are going overboard in the opposite polarity. In either cause repulsiveness has sensation associated with it which can tell you if your have gone too far.
You have to do all this in such a way that others don't see something odd in you.
Also you should not slack in order to do this or in anyway compromise on your work and responsibilities.
Most of all sensation is the most important thing to pay attention in such a situation and it where all the aggregates meet and the bridge physical fabrication and metal fabrications. Your mind is always in touch with sensations and activities driven by sensations. Things trickle down and up from these ends (Kaya to and from Dhamma).
This is the best you can do while engaging in another activity at work in my opinion.