mdf glossy paint

I am new here and must say that this site has been a huge learning tool for me with my projects so thanks all and great job so far. Now to the point, I was originally planning to fiberglass 2- 10s and 2- amps into my hatch (Scion tC). But due to my income and lack of time i dont think fiberglass is going to work for me. I am now planning the whole "box" out of mdf but only if i can achieve the same glossy paint look; I do not want the flat, dull color. I have searched and have came up empty besides this one post.

Start with a High Build Sealing Primer. These usually come in two types, paint on and spray on. I recommend using a roller and paint on type for this project (spray on works best on tiny projects and crazy designs projects) Sand that with 400 grit sandpaper to make it perfectly smooth. Then spray a few layers of paint (at least 3). Let that fully cure. Sand that down with 600 grit sandpaper and get that perfectly smooth. Then spray a few layers of clear over that. Asssuming you are using a spray can, you'll want at least 4 layers. Now the fun part, wet sanding. Since you used the sealing primer, the water should not affect your box at this point. Lightly MIST the area you are sanding with water and use a wet/dry sandpaper 1200 grit to remove any "orange skins" Then buff and polish for that "always wet" look. 

Does this actually work as stated or no? If not, can someone give me a bit of guidance?

still doesnt help much, i have found those, but none of them can be used on mdf...

is there something eles that i can achieve the same fill/sealant on wood?

Ok seriously, yes this does work... I use this all the time when I make art projects (in fact, it was my sculpture teacher that taught me about this) as well as work on vehicles. Since my significant other has been doing this for a while and he has an art degree too, he verified the idea and showed me an old project hiding in the wings where he used the sealing primer.

Look into a reputable art supply store (not a craft store) for it. It is a bit pricey at around $30-50 for a gallon of the roll on, but it really works!

Depending on which brand you get cure times will vary, but at the shop we own, we use Transtar Super Sand High Build Primer. It works with Acrylic, Urethane, and Enamel paints well when done with proper cure times and have the directions followed (based on ambient temperature and humidity)

The only kickback is that if you are using urethane based paints over it, it is recommended to use another sealer over it to minimize humidity warping from the urethane.

If you have any other questions, please do not hesitate to ask.

I'm not discrediting your idea. It is a valid one. I just have an alternative that I feel produces better results, so please do not take offence to this. I mean no disrespect.

Ganbatte ne!

No worries, none taken

I was simply throwing another option out there

Mike