dirt "pimples" under leading edge

[larryM]

My 1000 hr Skybolt has dirt that has worked itself up between the the leading edge and the fabric. It looks like little independant pimples from the outside. I also had a newly covered Pitts do the same thing in less than 100 hrs. Are there any solutions to prevent this from occuring after recovering? I know that the "felt" leading edges are not widely favored, for other reasons. Anyone else run into this and what is the solution?

Thanks,
larry

 

[wassbiplane]

 

[jrs14855]