Hi to all

I am struggling with painting canopy metal frames. I have tried different masking techniques but......I have also tried to find techniques on the net but to no avail, any suggestions?

Thanks ahead

Wheeze

Two things - try liquid mask and thin multiple coats.
When I use liquid masks I usually over cover the clear area. I let the mask dry 100% then I use a brand new fresh #11 hobby blade and cut the liquid mask exactally down to the edge. Then I paint in a number of thin coats to get good coverage. Thin coats helps reduce any paint sepage under the mask.

Another tip is to post this on Aeroscale and see what those guys say.

I recommend checking out this thread in the beginners section:

Masking Canopies

We had a discussion about liquid mask before. Personally I favor the technique of laying down thin strips of tape around the edges, then filling the middle area with several layers of liquid mask.

for metal frames , you could use ' bare metal foil ' cut with a sharp new blade to keep the edges clean , either in situ if you have curved corners , or just in strips on the sheet ( saves wrecking the transparency if you slip ) and then applied like a decal . it can easily be removed if you arn't happy with the result . it makes a good masks on any part really and is unaffected by any paint , residue left on clear parts can be carefully removed with a toothpick . neat and effective .

Don't we all !!
That's why so many premade canopy masks are available on the aftermarket.
Canopy masking is one of the most difficult parts of aircraft modeling. Its one of the main reasons I stopped trying to model aircraft for years.