Methods i have used ;

1- is it ok to use mill wax on a mylared playfield - Never used it on a playfield (mylar or not).
2-what is the best method for straightening warped plastics. Microwave using a baking tray, wax paper (think that's what it is called) and a plastic spatula. Place in microwave and low heat. I like Boot's idea better though !
3-can I buy drop targets locally I have found them in th US but $30 us seems a little excessive for postage on a $10 dollar item. RTBB will be stocking the target decals for several WMS titles next year.
4- the current plastics are held on by a little rubber nut that looks like it pushes on should I order the same rubber nuts as a replacement or should I order the same plastic ones that are on my FP & Flash. Factory are the 6/32 Nylon nuts.

http://www.rtbb.com.au/catalog/product_info.php?products_id=2730&osCsid=e4d05c26e0c210b086dad349709fc448