Off the shelf screen paint

Do you have a Sherwin Williams Store anywhere? Lowes is good.

Both locations have White Acrylic Latex Enamel "Bases" that can be Tinted with a light neutral Gray (8.0) and still cme very close to being at least a unity 1.0 gain surface.

Which you need because of the 500 lumen spec of the k330. But as far as any actual "Silver" paints....none are "Rollable" and certainly none are "affordable" either. To get the advanage of "Silver" it has to be blended into a Mix at certain various proportions and/or percentages. Your not going to find any such Mfg. paint anywhere with that sort variabilty or make-up.

Sorry to have break it to you.....but the one higher performance DIY Screen paint app that would serve you best....RS-MaxxMudd LL, would require sorcing some few paints. In your case....through the Internet for Home delivery. Everything else...it's all at Lowes or HD.

RS-MaxxMudd has the Silver and Pearl you need for gain (1.3-1.4) and a slight Whitish-Silvery-Gray hue as well. But more importantly its the only advanced DIY Paint with that level of gain that can be rolled. So if you want to extend your effort out a bit, you could acheive something very much specifically advanageous to your cause.

And I'll venture to say....from the experiences so many have provided testimony with, you'll get out of this experience the same measure of that what you instill into it....or more.

A little,,,,but only as used within a composite mix, no "stand alone".

But it has had a few very good reviews from those who have tried it (notwithstanding PC) and if you can slide by on using a White surface, it's probably as close to a sure thing as your gonna find.

Great news. I'm sure many will appreciate the effort you make to illuminate them.

We'll be looking forward to your posting!