Fiberglass Overlay?

Guys...if the dash is vinyl and its not going to be modified, DONT USE FIBERGLASS...theres absolutely no point.  sure u can drill holes and all that good stuff but its still not the greatest thing to do when all u want to do is make it smooth.  Take out the dash, if its got any soft vinyl on it then scrape it off including the glue/foam or whatever else they used, clean it up with some sort of wax and degreaser and then some soapy water, rinse it off very well...let the peices airdry or wipe em down with a cloth/towel u know is very clean.  If u wanna be extra careful then u can use rubber gloves so the oils of your fingers dont get on the project.  Once the piece(s) are clean and dry sand down the texture on the dash, spray it off, then wipe down with a tack cloth...Primer your piece(s) with a high build primer, depending on the sanding job u will need about 3-5 coats with sanding inbetween the layers, this will make the project smooth, then u can paint it and clear it...no fiberglassing is needed.

i agree no need to apply fg to this.  another product to consider is "oem" brand metal glaze.  its a polyester filler same as bondo or rage gold, but sands much eaiser.   i would condier using this on youru dash if it is made of Hard plastic and will not flex.  My 2 cents.  Clean it, Run over the texture with 36 grit or 80 grit to gouge it.  metal glaze it.  sand and finish.   

Best idea posible is to goto the junk yard pick up something similay are try on that first

I think the problem here is that everyone thinks that fg resin and bondo will adhere to oem plastic and it absolutly will not do so. when a lot of these people make fg parts for their dashes, door panels, etc, they are bonded to the plastic using duramix 4040 or similar product.

man if you want your dash smoothed and painted follow placid warrior's advice, its the only way you will properly get the job done and be show worthy.

DONT bother with FG unless you either wanna change the dash or rebuild sections of it, its too much effort wen u can do it just as good by cleaning it, good 2 coats of primer then floow thru with normal paint and laquer as stated above

Here is a little write up I found to work well for me. Trick is not to build up each coat of primer too high. Let it dry and then spray again.

https://www.the12volt.com/installbay/forum_posts.asp?tid=71371&PN=1