Hey Sithmaster,
Thanks ! The MDF is excellent ! It's VERY strong and sturdy. There's absolutely no noticable difference between the original wood-laminate and the MDF replacement in matter of strength. I feared a bit that by cutting out such a big hole for the CRT it would become less stable, but it's very rigid. It's also lighter and not the least important a LOT cheaper then anything else. Also very easy to saw/drill, but do be careful with the dust. (Wear a dust mask and work outside). I had my MDF sheet sawed at the DIY shop for free to the exact size. I only had to do the drilling and jigsawing for the CRT. I used 18 mm thick MDF. There are several standardized thicknesses here.
Dathnuno (Dragonlair) inspired me on both replacing the monitor with a TV-set using SCART, and re-creating the bezel. I love his site ! Did you see the Galaxian to Pac Man restoration he did ? Fantastic job !
http://www.dragonslairfans.com/phpBB2/viewtopic.php?t=195If needed, you can get a complete new (painted !) backdoor at
www.thisoldgame.com (Look under Misc Parts, scroll all the way down).
The marquee retainers are available here (repro's):
http://www.mikesarcade.com/cgi-bin/store.pl?sku=MBRACKETSET The coindoor will be more of a problem I guess, e-bay is your best bet here i think.
www.mamemarquees.com and
www.thisoldgame.com offer Galaxian art now !!
Do you know a serial no. of your cab, and what T-molding does it have ?
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Some updates:
1)
I went over to the company who does powdercoating. I showed him all the stuff and he suggested that I did all the "rough" sanding myself. If he would sandblast the parts, he might go through it (!!!!) or at least warp the parts. He normaly does a bit thicker metal things

)
It would also take him a lot of time (=money). So to save that (he mentioned €200,-) I will sand myself with an excentric sander as he suggested, just rougly. He will do the finishing/hard-to reach parts sandblasting.
I also showed him the coin door, and we found a RAL color that is almost exactly (you never know from a plastic example) the same and he said he could easily recreate the "bubble" effect.
2)
I won a bezel (plexi) on e-bay (thanks to the help of Negetavicreep0) and it arrived a couple of days ago. Of course it's not mint, but it's not bad either....take a look at the pics.....