- Walmart clear plastic tub of appropriate size for your item. As clear as possible.
- 12% hydrogen peroxide (I had about a gallon of 12%, and a gallon of 3%, had to dump them both all in the tub to fully cover the piece I was retrobriting. So I reckon I have 7.5% hydrogen peroxide now?)
- LED black light strip kit "32.8 ft LED Black Light Strip Kit 385-400nm https://www.amazon.com/dp/B07D7RKJYS?psc=1&ref=ppx_yo2ov_dt_b_product_details)
- Masking tape
- Clip-on stainless steel magnets (for clipping onto objects and forcing them to sink)
Instructions: Tape the LED lights on all six sides of the box. Spread them out as evenly as possible. Pour the hydrogen peroxide in the tub. Bubbles will make your object rise along with the apparently low density of hydrogen peroxide compared to the object (or maybe a chemist can explain why my stuff is floating). Clip on something heavy to weigh the object down, but be sure the clip doesn't cover any area on the object you want to brighten. Throw the stuff in the tub. Check periodically to make sure your item isn't floating to the top.
Yes indeed, normal sunlight will work just fine. This box helps spread the light more evenly around the object (sun can only come from one direction unless you install reflectors), and also I can run this box 24/7 instead of waiting for the few hours of sunlight we have in the north during the winter.