Hi Jaymmie,
Thank you for your comment. I understand your concerns (and I'm sorry your parents are homophobic). Would it be possible to buy the makeup under the pretense of buying it for a friend or someone else? If not (or if that seems too risky), long sleeves or accessories that might cover them are usually the safest bet, unfortunately. Thinking out of the box here—would temporary tattoos or body art work, or would that also trigger unwanted attention (from your parents or from others)?
(Also, please remember that you shouldn't apply makeup, temporary tattoos, paint, or anything else like that to fresh wounds, as it can cause infections and/or take longer to heal.)
The most foolproof method would, of course, be to stop hurting yourself entirely. I know that's easier said than done, but if and when you feel ready for that step, know that there are resources (here on this blog and elsewhere) that can help you get started.
I hope this helps? If you have any more questions/comments, feel free to reply here or elsewhere on the blog.
Sincerely,
Kim