Rallye Wheels - Help Needed

So, I bought a Valiant with SBP Rallye Wheels on all 4 corners. Car sat a long time and I went to pull the only wheel with a flat off it today and it will not budge.

Jack handle on breaker bar, impact gun, a few appear to move a tiny amount.
I tried working the lugs back and forth, no luck.
I've never had lugs not come off before.

I have zero experience with these wheels.

Is the center cap held on with bolts from the rear, on all Rallye wheels?

Is there a known issue with the chrome lugs seizing to the studs?

I wanted to use some penetrating spray, but I didn't want to leave it all over the center caps if it will somehow ruin them.

Just trying to pull 1 to move the car, and the others to clean/paint and determine the width so I can get some tires.

Any info the wheels is appreciated, lug size, width, silver paint, anything.

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