Speak to your vet and get a referral. Remember they are cancer and how you would wished to be treat if it was on you. The last sentence are the words said to me by professor Knottenbelt at Liverpool univercity. I witnessed him going absolutely ape at someone using toothpaste and turmeric, not myself I hasten to add but mine was in for radiotherapy and chemo and the other owner was told exactly what he thought.
Don't mess with it. Trying home/DIY treatments can cause later treatment to be unsuccessful. The best results I have seen have been those which were suitable for laser removal - less chance of recurrence or seeding (spread).
See vet and send photos to local specialist for cream to be made or referral for laser small sarcoids don't always stay small and now is good time of year to get treatment without flys being a nuisance. Good luck.x
Smallest? Do you know what level sarcoid they are, this means what type.
Only your vet can find this out by either taking a sample, or more likely by taking photos for liverpool to assess, so get the trained person to look at them as already mentioned above.