Hi guys I'm skinning a few parts and a issues I'm having now that hasn't happened before is the additional resin coats are lidying and flaking off.

Sounds like you are not mixing correct ratio, or are working at way too low temperatures and/or high humidity..

I work in a small heated workshop, that I keep at 20 degrees C.  I've never had any issues with XCR -- in fact it is by far the best skinning and coating epoxy I've ever worked with.

XCR seems to be very sensitive to getting the precise mixing ratio, so mixing very small batches can be tricky. I never mix less than 12 grams of resin to 4 grams of hardener.

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I do my skining in the house so always nice and warm buddy,  use the digital scales for ratio and mix for at least a few minutes. , first bunch of parts came out perfect and no issues, this is a new batch of resin and every part with it does this.