I know that you can spray BD mask but is there a problem getting it out of your gun when you're done? Has anyone had a problem with dope thinner attacking the mask? Is 4 coats enough to make it work.
Thanks ahead of time, Lanny Khelsea

I've used that product many times and all I can say is 'Thicker is Better than Thinner'...put it on thick (it's water based) and don't worry about the runs I never tried dope, only epoxy and it peels off a clean cut line!

Hi, I am the one who originally sold Liquid Masking Film to modelers. I was introduced to it by Ivan Christensen from Cananda. I owned Fliteglas Models at the time. Bob Dively bought Fliteglas Models from me and my wife, Martha, about 25 years ago.
When useing LFM it is best to spray it on in one thick coat. Runs don't matter. Use a spray gun that puts out a lot of volume. If you get it on to thin it will not peel off the model. You need to clean the spray gun out immediately with water. Spray a bunch of water thru the gun. It is possible to brush or dab LMF on, but it works much better to spray it on. When cutting the pattern out use a #11 blade. Don't press down on the blade, the weight of the handle is enough to cut thru the LMF. I never tried to use LMF over open framework. I believe it can be done, but only after getting use to using LMF. Again the weight of the #11 blade handle is enough pressure to cut the film. Again if you get it on too thin it is almost impossible to get off. Practice on an old wing panel before using it on your new model. If you only want to spray a small area, tape off the area with masking tape and paper so that the edge of the area will have some thickness. When used correctly, there is zero paint bleed under the film. It leaves a line the looks like it was cut from monokote film.
If you have any more questions, I am glad to answer them if I can.

By the way, you can thin LMF with water but it only takes a very small amount of water. If you get it too thin it will run off the model and leave the finished film too thin.

Ralph White, Neoga, IL

Ralph, I'm the modeler who wrote an article in RCM using your EXCELLENT product - it was used to paint a 1/6th scale Pica T-28 - no decals, only paint and it showed! Thank you for releasing such a fine product - too bad we are now in the ARF mentality and it seems only scale modelers paint anymore

Jerry Festa

Hi

I used to spray RC body shells and always used bob Diveleys LM.

I always thinned down the mix with 10 percent water.

I always used a paint spray gun not an airbrush as it clogs the nozzle to easily.

You realise you can paint brush on LM but do it in 3 coats. leaving the LM to dry clear before putting the next coat on.

Jerry, Sorry for the long delay in answering your post. Which issue of RCM was your article in? I've been out of modeling for about 25 years and don't remember if I saw your article or not. I would like to read it if I can get a copy of the month it was in RCM. I've just started flying again after the 25 year lay off. I'm enjoying it very much. He's a picture of my son, Nick, who's just started flying a year ago, and myself.
Ralph White, Neoga, IL

Ralph, I honestly can't remember, but it was back in the mid-to late 70's.....I don't remember if I saved a copy of that issue or not...I'll look and see what I can find.

I was always afraid to spray the LMF for fear that I could not get the gun clean enough. I always used a disposable brush and put it on as thick as I could get it. It absolutely has to be quite thick!!!! The thickness is especially important around the edges. I keep glopping it on until there are absolutely no thin spots.