hey. i have scars on my arms too. it does make things hard. especially in summer. on the upside if you are working in air conditioned buildings then i guess you can get away with lightweight long sleeves. i don't work with air conditioning, unfortunately. i feel very self conscious about them. people comment sometimes. i say i had an accident. if they push it i say i was in a car accident. they don't typically ask about my arms because my legs are more salient.

it IS hard.

have you tried holding ice?
and / or scribbling on yourself with a big red magic marker?