InFocus IN24 Multimedia Projector "remove blemishes" Questions

...not touch the mirror or magnifier inside. If this doesn't get all of the blemishes, then you will have to remove the top cover and then the top silver part of the engine and blow it out from the

...blemishes look like maybe its fuzz or something, you can remove the top cover and use compressed or canned air to blow out the area where you see 3 orange flat cables going under the main board into ...