Sometimes it can be a PIA to get body putty/fiberglass to stay put while it dries, especially on an edge. I've found a simple solution; just hold it in place with slick plastic like that from a blister/bobble pack or in the case, a section cut from a cat litter container. The putty/F-glass won't stick to it. I've also used it to repair trim items like side moldings with fiberglass with great results.

BTW: That's my DIY 12x16 paint booth and the front lid and DIY whale tail I'm working now. Car will be in next. The lil square hole in the wall has very strong fan inside it with an 8" dia vent tube out a window. Works great.











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[This message has been edited by Francis T (edited 09-12-2013).]

Nice!

I use wax paper in a similar way.

-Dave

I just use masking tape. Another little trick is filler wont stick to the smooth side of masking tape, so if you building an edge at a seam, you can cover a piece of cardboard with tape and insert it in the seam and just push filler in it. After it hardens, you just pull out the cardboard for a nice clean edge. I do that on door seams especially all the time.

Wow! I like your paint booth. I have been toying with something similar and less ambitious but I like your ideas so much better than my chewing gum and saran wrap idea. If my car doesn't sell, I will paint it next summer and will unashameably steal your paint booth idea. I can also use your idea about repairing edges too. I have absolutely no body work skills so I can use all the good ideas I have found here. Thanks for the great pix.