DIY Front Surface Mirror

Step 3 Remove protective paint from back side of mirror

At first use paint remover. I think any kind will work well.
Just one thing to remember. It will dissolve acrylic, so work fast and carefully.
You can use masking tape to protect plastic from contact with paint remover.

Check back side of mirror for scratches, dents, etc...
If reflective coating is damaged from back side, paint remover will go to plastic base and pop mirror foil up.

Next, use acetone to wipe off remains of paint remover and finish cleaning.

Reflective coating is very thin, so handle it accordingly.

...
UPDATE !!!
...

Since I've discovered Winning Colors Stain Remover I stopped using any other chemicals.
It's non toxic, environment friendly, water based liquid which will not harm acrylic and your skin. 

Now procedure is even easier:
1. Pour Winning Colors Stain  Remover into proper container.
2. Drop mirror into container. Painted side up.
3. Let it soak for 30 min or more (time may depend on back paint and size of mirror).
4. If paint got loose and started peeling off, remove mirror and put into container filled with tap water or rinse it under water stream. You may use cotton balls and gently swab mirror while it immersed. Optional step is to rinse mirror with steam distilled water in order to remove any particle left from tap water.
5. Pour remaining liquid back into bottle for future use.

Comments

[lemursquad]

Oh, and acetone will pull off the mirror surface easily. At least it did for me with the mirrored acrylic from Tap Plastics. However if you use Mötsenböcker’s (which is water based), you won't need the acetone. After you strip, rinse the residue off with water and dry with a clean soft rag. Worked like a charm for me.

[lemursquad]

For the record this works awesome:
1. Mirrored Acrylic from Tap PlasticsTap Plastics
2. Mötsenböcker’s Lift off 5Mötsenböcker’s Lift off 5 Latex Based Paint Remover

Mötsenböcker’s doesn't damage the mirror surface or the acrylic at all. You have to let it sit for awhile though, about 5+ minutes. You shouldn't have to "rub" to get the paint off, if you let it sit long enough, the paint will just float off. Using a synthetic paint brush and LIGHTLY brushing the surface helps speed up the process.

Try it on a practice piece first. It worked flawlessly for me.

[minorite]

thank you for posting this.