Im not sure if they did anything to blend it in and it seemed like they didnt do a good job because when i got it back the epoxy was dark brown (my base is white) so it stuck out like a sore thumb and also it seem as if the epoxy was cracking even before i rode it.
dont bother with epoxy you can do a do it yourself in like 2 min at home no joke. get a stick of p-tex they should sell it at your local boardshop and drip it on with a hot iron as you would like hot waxing your board right into the coreshot and then scrape it off like wax. thats a complete fix and itll last a long time, and if it does fall out you can just re-do that. its a quick fix and it works really good because p-tex is what your base is.