Hy guys,

I have plug made from MDF that was CNC routed.

I've read that it's really hard to achieve gloss surface if MDF is not impregnated and "sealed" properly. It's hard for me to find products that are used for example in America and I have to take DIY approach. I figured that it might be possible to use polyurethane 2K varnish but diluted 20-30% so MDF can soak it easily.
Does anyone have similar experience? 

Also, I saw some DIY ovens made completely from support frame and MDF panels with rock wool between outer and inner panels. My plan is to build wooden frame, put 12 - 16mm MDF for outer shell, place rock wool around box from inside and than make smaller box that fits in from steel sheeting of aprox. 1-1.5mm thickness. I would make it so it opens from top side like a lid. I need curing temperatures of around 110-120°C (aprox. 250°F). Inner dimensions would be 160x70x50cm and I was thinking about 3 to 4 heaters of 1kW strength. 

Will this kind of build be ok to withstand those curing temperatures because I am afraid of oven catching fire? 

Also, I am looking for good PID controler with ramp and soak function so I can make proper curing cycle for pre-pregs. I've found some OMEGA controllers, but I am not quite sure what's good and what's not so please if you have suggestions feel free to write.

Ive got the CN7800, its a fantastic controller. Always dead accurate within 0.1 of a degree, and once you get a hang of the Chinglish instructions it is very simple and easy to operate.

Just make sure you get the model with the built in power supply for switching the SSR, don't do what I did and get the one with no power supply. If you do then you need to wire in a 9v battery or something like a phone charger to provide a load to switch the SSR. I can't remember which model is which, but have a look at the wiring diagrams in the manual and you can work it out. Or just ask Omega.